NCERT Exemplar Class 11 Maths Chapter 8 Binomial Theorem

NCERT Exemplar Class 11 Maths Chapter 8 Binomial Theorem are part of NCERT Exemplar Class 11 Maths . Here we have given NCERT Exemplar Class 11 Maths Chapter 8 Binomial Theorem.

NCERT Exemplar Class 11 Maths Chapter 8 Binomial Theorem

Short Answer Type Questions:

Q1. Find the term independent of x, where x≠0, in the expansion of \({ \left( \frac { 3{ x }^{ 2 } }{ 2 } -\quad \frac { 1 }{ 3x }  \right)  }^{ 15 }\)

Q2. If the term free from x is the expansion of  \({ \left( \sqrt { x } -\frac { k }{ { x }^{ 2 } }  \right)  }^{ 10 }\) is 405, then find the value of k.

Sol: Given expansion is \({ \left( \sqrt { x } -\frac { k }{ { x }^{ 2 } }  \right)  }^{ 10 }\)

Q3. Find the coefficient of x in the expansion of (1 – 3x + 1x ² )( 1 -x) ¹⁶ .

Sol: (1 – 3x + 1x ² )( 1 -x) ¹⁶

Q4. Find the term independent of x in the expansion of \({ \left( 3x-\frac { 2 }{ { x }^{ 2 } }  \right)  }^{ 15 }\)

Sol: Given Expression \({ \left( 3x-\frac { 2 }{ { x }^{ 2 } }  \right)  }^{ 15 }\)

Q5. Find the middle term (terms) in the expansion of

Q6. Find the coefficient of x ¹⁵ in the expansion of \({ \left( x-{ x }^{ 2 }\quad  \right)  }^{ 10 }\)

Sol: Given expression is \({ \left( x-{ x }^{ 2 }\quad  \right)  }^{ 10 }\)

Q7. Find the coefficient of \(\frac { 1 }{ { x }^{ 17 } } \) in the expansion of \({ \left( { x }^{ 4 }-\frac { 1 }{ { x }^{ 3 } } \quad  \right)  }^{ 15 } \)

Q8. Find the sixth term of the expansion (y ^1/2 + x ^1/3 ) ⁿ , if the binomial coefficient of the third term from the end is 45.

>

Q9. Find the value of r, if the coefficients of (2r + 4)th and (r – 2)th terms in the expansion of (1 + x) ¹⁸ are equal.

Q10. If the coefficient of second, third and fourth terms in the expansion of (1 + x) ² ” are in A.P., then show that 2n ² – 9n + 7 = 0.

Q11. Find the coefficient of x ⁴ in the expansion of (1 + x + x ² + x ³ ) ¹¹ .

Long Answer Type Questions

Q12. If p is a real number and the middle term in the expansion \({ \left( \frac { p }{ 2 } +2\quad \right) }^{ 8 } \) is 1120, then find the value of p.

Q15. In the expansion of (x + a) ⁿ , if the sum of odd term is denoted by 0 and the sum of even term by Then, prove that

Q17. Find the term independent ofx in the expansion of (1 +x + 2x ³ )\({ \left( \frac { 3 }{ 2 } { x }^{ 2 }-\frac { 1 }{ 3x } \quad \quad  \right)  }^{ 9 } \)

Objective Type Questions

Q18. The total number of terms in the expansion of (x + a) ¹⁰⁰ + (x – a) ¹⁰⁰ after simplification is

(a) 50
(b) 202
(c) 51
(d) none of these

Q19. If the integers r > 1, n > 2 and coefficients of (3r)th and (r + 2)nd terms in the binomial expansion of (1 + x) ²ⁿ are equal, then
(a) n = 2r
(b) n = 3r
(c) n = 2r + 1
(d) none of these

Q20. The two successive terms in the expansion of (1 + x) ²⁴ whose coefficients are in the ratio 1 : 4 are
(a) 3 ^rd and 4 ^th
(b) 4 ^th and 5 ^th
(c) 5 ^th and 6 ^th
(d) 6 ^th and 7 ^th

Q21. The coefficients of x ⁿ in the expansion of (1 + x) ²ⁿ and (1 + x) ²ⁿ ~ ¹ are in the ratio
(a) 1 : 2
(b) 1 : 3
(c) 3 : 1
(d) 2:1

Q22. If the coefficients of 2 ^nd , 3 ^rd and the 4 ^th terms in the expansion of (1 + x) ⁿ are in A.P., then the value of n is
(a) 2
(b) 7
(c) 11
(d) 14

Q23. If A and B are coefficients of  x ⁿ in the expansions of (1 + x) ²ⁿ and (1 + x) ²ⁿ – ¹ respectively, then A/B  equals to

LearnCBSE Online