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A research team consists of 10 boys and 6 girls. A team of 3 to be formed to present their studies to a class. i) In how many ways can the team be formed? A) 280 B) 560 C) 650 D) 1120 ii) If the team consists of 2 boys and 1 girl, in how many ways can the team be formed? A) 280 B) 540 C) 270 D) 120 iii) If the team consists of 1 boy and 2 girls, in how many ways can the team be formed? A) 150 B) 200 C) 300 D) 120

Posted by Neelu Neelu 4 years, 3 months ago

CBSE > Class 11 > Mathematics

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Multiple inverse of 3-2i?

Posted by Sagarika Loka 4 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Muskan Sharma 4 years, 3 months ago

Answer

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Using binomial theorem,indicate which number is larger (1.1)^10000 or 1000

Posted by Mahalakshmi Bujji?? 4 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Nishtha Kalra 4 years, 3 months ago

(1.1)^(10000) = (1 + 0.1)^(10000) use formula, (x + y)^n = nC0.x^n + nC1.x^(n-1)y + nC2.x^(n-2)y^2 + ........+nCn.y^n (1 + 0.1)^(10000) = 10000C0.(1)^(10000) + 10000C1.(1)^9999(0.1) + ....... other terms = 1 × 1 + 10000 × 0.1 + ......... other terms . = (1 + 1000 + .......other terms ) > 1000 hence, (1.1)^(10000) > 1000

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Gaurav Seth 4 years, 3 months ago

(1.1)^(10000) = (1 + 0.1)^(10000)
use formula,
(x + y)^n = nC0.x^n + nC1.x^(n-1)y + nC2.x^(n-2)y^2 + ........+nCn.y^n

(1 + 0.1)^(10000) = 10000C0.(1)^(10000) + 10000C1.(1)^9999(0.1) + ....... other terms

= 1 × 1 + 10000 × 0.1 + ......... other terms .

= (1 + 1000 + .......other terms ) > 1000

hence, (1.1)^(10000) > 1000

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Find the sum to n terms of an A. P whose k^th term is 5k+1

Posted by Abhinav S S 4 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Gaurav Seth 4 years, 3 months ago

As, it is given that k ^th term of the A.P. is 5k + 1.

therefore,

a_k= a + (k – 1)d

⇒ a + (k – 1)d = 5k + 1

⇒ a + kd – d = 5k + 1

now, on comparing the coefficient of k, we get,

d = 5

and

a – d = 1

⇒ a – 5 = 1

⇒ a = 6

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General equation of line?

Posted by Siddharth .(.$Id) 4 years, 3 months ago

CBSE > Class 11 > Mathematics

3 answers

Ff Sedn 4 years, 3 months ago

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Harshita Dhariwal 4 years, 3 months ago

Ax+By+C=0

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Yogita Ingle 4 years, 3 months ago

We know that graph of general equation of first degree in two variables, Ax + By + C = 0, where A, B and C are real constants such that A and B are not zero simultaneously is a straight line.

Thus General Equation of Straight line is Ax + By + C = 0, where A, B and C are real constants such that A and B are not zero simultaneously.

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Slope intercept form?

Posted by Siddharth .(.$Id) 4 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Yuvraj Singh 4 years, 3 months ago

The slope intercept form is in the form of y = mx + c in this m is the slope and c is the intercept on the x-axis.

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Yogita Ingle 4 years, 3 months ago

The graph of the linear equation y = mx + c is a line with m as slope, m and c as y-intercept. This form of the linear equation is called slope-intercept form. The values of m and c are real numbers.

The slope, m, represents the steepness of a line. The slope of the line is also termed as gradient, sometimes. The y-intercept, b, of a line, represents the y-coordinate of the point where the graph of the line intersects the y-axis.

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Express complex number ( 1 − ? )? in the form a + i b.

Posted by Osm Gamers 4 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Gaurav Seth 4 years, 3 months ago

The question is not clear

Assuming the question to be: Express the given complex number in the form a + ib: (1 – i)⁴

A n s w e r

complex number in the form a + ib:

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Prove that : 1 + ? ?? + ? ??? − ? ???? = 0

Posted by Osm Gamers 4 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Dεερακ Ȿιηɠꜧ 4 years, 3 months ago

Multiply both sides by zero
0=0 → LHS= RHS ,, , . hence proved

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Gaur Saab?? 4 years, 3 months ago

1+1+1-3=0

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Find the domain and range of function defindly by f (x) = - (x)

Posted by Vansh Thakur 4 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Magan Garval 4 years, 3 months ago

Domain=all real numbers Range=all non positive real numbers

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Deleted topic in math

Posted by Ranger King 4 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Ranger King 4 years, 3 months ago

DELETED PORTION MATHEMATICS - 041 CLASS XI UNIT/ CHAPTER SYLLABUS REDUCED Unit- I: Sets and Functions 1.Sets Difference of sets. Complement of a set. Properties of Complement 2.Relations & Functions (up to RXRXR ). Sum, Difference, product and quotients of functions 3. Trigonometric Functions General Solutions of trigonometric equations of the type siny=sina, cosy=cosa and tany= tana. Unit II: Algebra 1.Principle of Mathematical Induction Delete full chapter 2.Complex Numbers and Quadratic Equations Polar representation of complex numbers. Square root of a complex number. 3.Linear Inequalities Nil 4. Permutations and Combinations Derivationof formulae for nPrandnCr 5.Binomial theorem Delete full Chapter 6. Sequence and Series Formulae for the following special sums ∑ ?,∑k2,∑ ?3 . Unit III: Coordinate geometry 1.Straight Lines Shifting of origin. Equation of family of lines passing through the point of intersection of two lines. 2 Conic sections a point, a straight line and a pair of intersecting lines as a degenerated case of a conic section. 3.Introduction to Three-dimensional Geometry Nil Unit-IV : Calculus 1.Limits and Derivatives Nil Unit-V : Mathematical Reasoning 1.Mathematical Reasoning Delete full chapter Unit-VI: Statistics and Probability 1. Statistics Analysis of frequency distributions with equal means but different variances. 2. Probability Axiomatic (set theoretic) probability, connections with other theories of earlier classes

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Find three numbers in G.P. whose sum is 28 and whose product is 512.

Posted by Dhruv Sharma 4 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Ranger King 4 years, 3 months ago

Let the three numbers be a,ar, ar2, where r is the common ratio. ⇒a+ar+ar2=28 and a3r3=512 ⇒ar=8⇒a+ar2=20 ⇒8r2−20r+8=0 ⇒r=2,r=21 If r=2,a=4 Therefore, the three numbers are 4,8,16

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Yogita Ingle 4 years, 3 months ago

The three numbers in GP are 4 , 8 , 16.

Let the three numbers in GP be a/r , a , ar.
Now the product of three numbers is given as 512.

a/r × a × ar = 512

a³ = 512

a = 8

Now sum of the three numbers is given as 28.

a/r + a + ar = 28

8/r + 8 + 8r = 28

8 + 8r² = 20r

8r² - 20r + 8 =0

8r² - 16r - 4r + 8 =0

8r(r-2) - 4(r-2) = 0

(r-2)(8r-4) = 0

Therefore, r = 2 or r=1/2
Now , the three numbers are 4,8,16.

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ANSWER

Find next number in sequence 2,6,12,20......?

Posted by Akhil Baluni 4 years, 3 months ago

CBSE > Class 11 > Mathematics

3 answers

Anmol Agarwal 4 years, 3 months ago

30 is the next number

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Abirami Kamalbabu 4 years, 3 months ago

30 is the next number. It is of the order +4,+6,+8,+10,+12,...

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Ranger King 4 years, 3 months ago

30,42,56,72 because 6-2=4,12-6=6, 20- 12=8 it mean increasing 2 so 30,42,56,72 is next sequence

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Solve permutations 5p3= np4

Posted by Doli Kansal 4 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Ranger King 4 years, 3 months ago

5!/(5-3)!= n!/(n-4)! 5!/2!=n×(n-1)(n-2)(n-3)(n-4)!/(n-4)! 5×4×3×2!/2!= n(n-1)(n-2)(n-3) {(n-4) and 2! Is cut with same digit)} 60 = n(n-1)(n-2)(n-3) ise solve karo answer aa jayga

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Find the value of tan pi by 8

Posted by Sri Watsa Cbse Board Exam 4 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Ranger King 4 years, 3 months ago

Example 27 chapter 3 math

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i. ???1050° ii. ?????(−120°) iii. ???( 11? 3 ) 2. The value of √3 ?????20° − ???20°_____

Posted by Kumari Roshni 4 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Nishtha Kalra 4 years, 3 months ago

i. ???1050°=sin(-30) ii. ?????(−120°) =Cosec 240 iii. ???( 11?/3 ) =tan(-60)

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Dεερακ Ȿιηɠꜧ 4 years, 3 months ago

i. ???1050°=sin(-30)

ii. ?????(−120°) =Cosec 240

iii. ???( 11?/3 ) =tan(-60)

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Deleted portion of ch 1 sets

Posted by Dhruv Sharma 4 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Magan Garval 4 years, 3 months ago

3 chapter delete 2020 -21 academy year

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Ranger King 4 years, 3 months ago

1. Difference of sets. Complement of a set.2. Properties of Complement

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Find sum 5/2+7/4+5/8+7/16+5/32+7/64___________infinity.

Posted by Rajni Yadav 4 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

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What is asimptot

Posted by Priya Kumari 4 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Yogita Ingle 4 years, 3 months ago

An asymptote is a straight line that constantly approaches a given curve but does not meet at any infinite distance. In other words, Asymptote is a line that a curve approaches as it moves towards infinity.

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Tikeswari Barik 4 years, 3 months ago

Biology

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The ratio of the AM and GM of two positive numbers a and b is m:n,find the ratio of the numbers

Posted by Ramphal Singh Choudhary 4 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Gaurav Seth 4 years, 3 months ago

The ratio of the A.M and G.M. of two positive numbers a and b, is m: n. Show that

a:b=(m+ √(m²-n²)):(m-√(m²-n²))

Answer

Using this in the identity (a – b)² = (a + b)² – 4ab, we obtain

Adding (1) and (2), we obtain

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The equation of the parabola with vertex at the origin, passing through the point (2, 3) and symmetric with respect to Y-axis is

Posted by Mansi Vekariya 4 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Kiran Sangwan 4 years, 3 months ago

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Yogita Ingle 4 years, 3 months ago

parabola passes through the point ( 2,3),hence the coordinates x=2 and y=3 must satisfy the equation of the parabola is x²= 4ay

(2)² = 4a (3)

4 = 12a a = 4/12 = 1/3.

Hence the equation of the porabola is x² = 1/3y or 3x² = y

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Define root squar

Posted by Echan Nungcbi 4 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Cute Baccha❤️ 4 years, 3 months ago

How simple

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Gaurav Seth 4 years, 3 months ago

Square root of a number is a value, which on multiplied by itself gives the original number. Suppose, x is the square root of y, then it is represented as x=√y or we can express the same equation as x² = y. Here, ’√’ is the radical symbol used to represent the root of numbers. The positive number, when multiplied by itself, represents the square of the number. The square root of the square of a positive number gives the original number.

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The mid points of the side of a triangle are(1,5,-1);(0,4,-2)and(2,3,4) Find its vertices

Posted by Pakhi Shah 4 years, 3 months ago

CBSE > Class 11 > Mathematics