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Gaurav Seth 7 years, 2 months ago

a) The number of ways in which at least two of them are in the wrong envelopes

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=15+40+135+264+265

=719

b) The number of ways in which all letters be placed in the wrong envelopes

= 6! ()

=720

=720()

=360-120+30-6+1

=265

Nancy Rajput 7 years, 2 months ago

pls its urgent answer this

ANSWER

let f(x) be a function defined by f(x)=(3x/(modulus x)+2x ,x not equal to 2, x equal to 2 show that lim x tending to 0 f(x) does not exist

Posted by Satyam Rai 7 years, 2 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Y=mx+√3m^2-4 is tangent to

Posted by Amit Kandari 7 years, 2 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Q. Find the sum total infinity for the given Geometric Progression: 1. 1/3, 1/9, ..... Can the question pls be answered step -by-step?

Posted by Akina Chishi♥ 7 years, 2 months ago

CBSE > Class 11 > Mathematics

3 answers

Akina Chishi♥ 7 years, 2 months ago

@yakshi? thank u❤

Yakshi ? 7 years, 2 months ago

There is a formula for the infinite sum of a g.p. i.e. a1 / (1-r)........infinite ka sum tabhi nikala jaa sakta hai jab.......r(ratio) '1' se less aur '0' se greater ho....... iss.......question mein b 'r' '1' se less hai........ratio= 2nd term divided by 1st term.........or 3rd term divided by 2nd term .......so here ratio is equal to 1/3......... and a1 is the first term i.e. 1. ........now put the values in the formula

4Thank You

Akina Chishi♥ 7 years, 2 months ago

Can someone pls help ans. (!)

ANSWER

Derivation of all limits and derivatives

Posted by Vanshika Dhama 7 years, 2 months ago

CBSE > Class 11 > Mathematics

1 answers

Aman Kumar 7 years, 2 months ago

U may get this in this app

3Thank You

ANSWER

Derivation of inverse derivatives

Posted by Vanshika Dhama 7 years, 2 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Find the distance of point p(6,-6) from the origin

Posted by Gulshan Raj 7 years, 2 months ago

CBSE > Class 11 > Mathematics

5 answers

Yakshi ? 7 years, 2 months ago

Mai toh khuddh confuse thi....??? well....u r most welcome...

Aman Kumar 7 years, 2 months ago

Yaah..its √72 ...ur answer is correct...thanks for correcting me?

Yakshi ? 7 years, 2 months ago

Aman i think answer under root 72 aana chahiye.....plz mujhey btana agar mera answer galat hai toh

Yakshi ? 7 years, 2 months ago

Acc. To distance formula......._/ (x2 - x1) ^2 + ( y2-y1)^2.........here ......as given p(6, -6) and second points will be (0,0).....as it is from origin......now let (x1,y1) as (6,-6)....and (x2,y2) as (0,0).....and put the values in formula.......what u will get is.... _/ 72.......

Aman Kumar 7 years, 2 months ago

Is the answer is 72...

ANSWER

Find the equation of of an ellipse whose foci is + minus (4,0) and dysentry city is 1/ 3

Posted by Sapna Nag 7 years, 2 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Ncert ex-4.1 Q1 for n= k+1 is also true

Posted by Pankaj Mittal 7 years, 2 months ago

CBSE > Class 11 > Mathematics

1 answers

Yakshi ? 7 years, 2 months ago

Prakhar....???

ANSWER

Find derivative of e to the power root tanx from 1st principle

Posted by Vishal Sharma 7 years, 2 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

9!/5!*3!

Posted by Aman Kumar Singh 7 years, 2 months ago

CBSE > Class 11 > Mathematics

2 answers

Aman Kumar 7 years, 2 months ago

Hope this helps

Aman Kumar 7 years, 2 months ago

9×8×7×6×5!/5!×3×2×1.....=> 504....

ANSWER

A wheel makes 18 revolution in 1 minute . Through how many radians does it turn in 1 seconds

Posted by Priyesh Oraon 7 years, 2 months ago

CBSE > Class 11 > Mathematics

1 answers

Ram Kushwah 7 years, 2 months ago

18 rev =18×2π=36π rad in 60 sec

So in 1 sec angle moved

=36π/60=3/5π radians

ANSWER

Difference btwn eqution and identity.

Posted by Varshini Selva Murugan 7 years, 2 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Derivatives of cot x according to first principal

Posted by Raju Bhai 7 years, 2 months ago

CBSE > Class 11 > Mathematics

1 answers

Nancy Rajput 7 years, 2 months ago

-cosec^2x

ANSWER

Class 11 maths ch-10 important s question

Posted by Nitesh Jha 7 years, 2 months ago

CBSE > Class 11 > Mathematics

2 answers

Ankit Singh 7 years, 2 months ago

Nice Priya

Priya Dharshini ? 7 years, 2 months ago

Misscelaneous solved and unsolved example and 10.3 exercise is important, then solved example

ANSWER

what is the difference between equation of a circle with given radius and centre and general equation of a circle please answer immediately

Posted by Aviral Shukla 7 years, 2 months ago

CBSE > Class 11 > Mathematics

1 answers

Aryan Garg 7 years, 2 months ago

General equation of the circle is the equation which can be used for any circle ..but for ease of solving question we are using the equation in which we can find the the equation by just putting the circle's centre and radius..