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Mcq of chapter 1

Posted by Ashok Jha 6 years, 7 months ago

CBSE > Class 09 > Mathematics

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Find the value of a and b if √7-1/√7+1-√7+1/√7-1=a+b√7

Posted by Ram Kumar 6 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Shaswat Panda 6 years, 7 months ago

―35+16√7

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If x+y+z=0,show that x^3 + y^3 +z^3 =3xyz

Posted by Vyapak Soni 6 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 6 years, 7 months ago

If x+y+z=0, show that x³ + y³ + z³= 3xyz
Given that :
x + y + z = 0 ......(1)
We know that,
x³ + y³ + z³ - 3xyz =(x + y + z)(x² + y² + z² - xy - yz - zx) ......(2)
Substituting the value of (1) in (2), we get
x³ + y³+ z³ - 3xyz = 0
x³+ y³ + z³ = 3xyz

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Bracket 3 + root 3 bracket of bracket 2 + root 2 bracket of

Posted by Moksh Bishnoi 6 years, 7 months ago

CBSE > Class 09 > Mathematics

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Explaing of zero

Posted by Surendra Verma 6 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

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Area of circle Perimeter of circle

Posted by Mahi Choudhary 6 years, 7 months ago

CBSE > Class 09 > Mathematics

3 answers

Neetu Bansal 6 years, 7 months ago

Perimeter=2πr and Area=πrr

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Anurag Gupta 6 years, 7 months ago

Perimeter =2πr and area of cricle =πrr

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Samruddhi Br 6 years, 7 months ago

Perimeter = 2πr Area= πrr

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If x2+7x+12

Posted by Rekha Bidwaik 6 years, 7 months ago

CBSE > Class 09 > Mathematics

2 answers

Madan Pasi 6 years, 7 months ago

We shall use the splitting method. Multiply x with 12 and you will get 12 (first and last). We have to look at the constant not variable. Now see the factors of 12 in pairs and those are (6,2),(4,3) and (12,1). 4 and 3 make a pair and their addition would be 7 which is the middle number. x²+3x+4x+12 x(x+3)+ 4(x+3) (x+4)+(x+3)

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Aarti Sharma 6 years, 7 months ago

X2+4x+3x+12 X(x+4)+3(x+4) (x+4)(x+3)

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Exaplain the polynomial chapter in Hindi

Posted by Shivam Mishra 6 years, 7 months ago

CBSE > Class 09 > Mathematics

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x+1/x=11 , findx*x*x +1/x*x*x

Posted by Pooja Bansal 6 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

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X square + y square= 25

Posted by Adil Khan 6 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Samruddhi Br 6 years, 7 months ago

Square on both the sides

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Eid x is equal to zero and Y is equal to K is a solution of the equation 5 x minus 3 Y is equal to 3 find the value of k

Posted by Bikash Pradhan 6 years, 7 months ago

CBSE > Class 09 > Mathematics

2 answers

Ashwini Choudhary 6 years, 7 months ago

K=0

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Bikash Pradhan 6 years, 7 months ago

K=0

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If f(x) be polynomial such that f(-1/3) = 0 then find one factor of f(x)

Posted by Harsh Sharma 6 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

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Write the degree of each of the following polonomials

Posted by Vinay Pal 6 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Adil Khan 6 years, 7 months ago

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Is x square + 4x raise to 3/2 divided by root X a polynomial? Justify your answer

Posted by Sanjana Jayakumar 6 years, 7 months ago

CBSE > Class 09 > Mathematics

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Factorise suitable identity 1)a3+a-3a2-3

Posted by Vivek Yadav 6 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

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Express the greatest 6 digit number as a product of primes.

Posted by Sandeep Saw 6 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Sandeep Saw 6 years, 7 months ago

Express the greatest 6 digit number as a product of primes.

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Coefficient of x square in the expression of (x-2) raise to the power 3

Posted by Sanjana Jayakumar 6 years, 7 months ago

CBSE > Class 09 > Mathematics

4 answers

Adil Khan 6 years, 7 months ago

-2

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Tisha Garg 6 years, 7 months ago

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Shaswat Panda 6 years, 7 months ago

―7

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Santoshi Verma 6 years, 7 months ago

The coefficient of X is = 1

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Show root 5 on number line

Posted by Kartik Desale 6 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Tanisha Singh 6 years, 7 months ago

1)make number line 2)make two points ( we have taken 2 points because we know that the square root of 2 is 4 ) 3) now make a line of 1 cm horizontally 4)now join it and if will form a tringal 5)now put your compass at point o or at point 0 and strech it to the hytemnous and make a arc and cut the time 6) now u get root 5 7) u can also show Pythagoras therom

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Proof that 1 litre =1000millilitre

Posted by Bittu Beauty 6 years, 7 months ago

CBSE > Class 09 > Mathematics

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Add 3 root 5 +2 root 3 and 4 root 3 - 6 root 5

Posted by Shanmukha Vardhan 6 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Shaswat Panda 6 years, 7 months ago

―3√5+6√3

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√24/8+√54/9 Simplify it?

Posted by Dilip Bhisade 6 years, 7 months ago

CBSE > Class 09 > Mathematics

2 answers

Shaswat Panda 6 years, 7 months ago

11√6/17

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Shaswat Panda 6 years, 7 months ago

√3+√6

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Find the value of a and b in each of the following 5+2√3/7+4√3 = a+b√3

Posted by Hitaishi Lilhare 6 years, 7 months ago

CBSE > Class 09 > Mathematics

2 answers

Shaswat Panda 6 years, 7 months ago

a=11 and b=(―6)

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Gaurav Seth 6 years, 7 months ago

LHS = (5 + 2√3 ) / ( 7 + 4√3 )

rationalize the denominator

= (5 + 2√3 ) ( 7 - 4√3 ) / [ ( 7 + 4√3 ) ( 7 - 4√3 )

= [ 5 ×7 - 5 × 4√3 + 2√3 × 7 - 2√3 × 4√3 ] / [ (7 )² - (4√3 )² ]
here we used ( x + y ) (x - y ) = x² - y² identity

= [35 -20√3 + 14√3 -24 ] / [ 49 - 48 ]

= (11 - 6√3 )

therefore ,

LHS = RHS

11 - 6√3 = A - B√3

comparing both sides

A = 11,

B = 6