NCERT Solutions for Class 11 Maths Chapter 8 Binomial Theorem Ex 8.2 are part of NCERT Solutions for Class 11 Maths. Here we have given NCERT Solutions for Class 11 Maths Chapter 8 Binomial Theorem Ex 8.2.

Board |
CBSE |

Textbook |
NCERT |

Class |
Class 11 |

Subject |
Maths |

Chapter |
Chapter 8 |

Chapter Name |
Binomial Theorem |

Exercise |
Ex 8.2 |

Number of Questions Solved |
12 |

Category |
NCERT Solutions |

## NCERT Solutions for Class 11 Maths Chapter 8 Binomial Theorem Ex 8.2

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**Ex 8.2 Class 11 Maths Question 1.**

Find the coefficient of x^{5} in (x + 3)^{8}

**Solution.**

Suppose x^{5} occurs in the (r + 1)^{th} term of the expansion (x + 3)^{8}

**Ex 8.2 Class 11 Maths Question 2.**

a^{5 }b^{7}in (a-2b)^{12}

**Solution.**

Suppose a^{5 }b^{7} occurs in the (r + 1)^{th} term of the expansion (a – 2b)^{12}.

Write the general term in the expansion of

**Ex 8.2 Class 11 Maths Question 3.**

(x^{2 }– y)^{6}

**Solution.**

**Ex 8.2 Class 11 Maths Question 4.**

(x^{2 }– yx)^{12}, x ≠ 0

**Solution.**

We have given, (x^{2} – yx)^{12} = (x^{2} + (- yx))^{12}, x ≠ 0

**Ex 8.2 Class 11 Maths Question 5.**

Find the 4th term in the expansion of (x – 2y)^{12}.

**Solution.**

**Ex 8.2 Class 11 Maths Question 6.**

Find the 13th term in the expansion of \({ \left( 9x-\frac { 1 }{ 3\sqrt { x } } \right) }^{ 18 }\), x ≠ 0

**Solution.**

Find the middle terms in the expansions of

**Ex 8.2 Class 11 Maths Question 7.**

\({ \left( 3-\frac { { x }^{ 3 } }{ 6 } \right) }^{ 7 }\)

**Solution.**

As the exponent 7 is odd, so there will be two middle terms in the expansion

**Ex 8.2 Class 11 Maths Question 8.**

\({ \left( \frac { x }{ 3 } +9y \right) }^{ 10 }\)

**Solution.**

**Ex 8.2 Class 11 Maths Question 9.**

In the expansion of (1 + a)^{m+n}, prove that coefficients of a^{m} and a^{n} are equal.

**Solution.**

**Ex 8.2 Class 11 Maths Question 10.**

The coefficients of the (r – 1)^{th}, r^{th} and (r + 1)^{th} terms in the expansion of (x + 1 )^{n} are in the ratio 1: 3: 5. Find n and r.

**Solution.**

**Ex 8.2 Class 11 Maths Question 11.**

Prove that the coefficient of x^{n} in the expansion of (1 + x)^{2n} is twice the coefficient of x^{n} in the expansion of (1 + x)^{2n-1}.

**Solution.**

**Ex 8.2 Class 11 Maths Question 12.**

Find a positive value of m for which the coefficient of x^{2} in the expansion (1 + x)^{m} is 6.

**Solution.**

Expanding Binomial Calculator is a free online tool.

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