NCERT Solutions for class 11 Maths | Chapter 8 - Binomial Theorem

(1) 8n - 7n - 1 is always divisible by ____.
[A] 64
[B] 7
[C] 49
[D] 8
Answer: 49
(2) The sum of the coefficients ncncnc3 + ...ncn is equal to ____
[A] 2n
[B] 2n+ 1
[C] 2n + 1
[D] 2n - 1
Answer: 2n - 1

DOWNLOAD CURRENT AFFAIRS PDF FROM APP

Article and Schedule Quiz Start Test!
(3) The middle term in the expansion of [x/3 - 2/x]11is ____.
[A] 5th term
[B] 6th term
[C] 5th and 6th terms
[D] 6th and 7th terms
Answer: 6th and 7th terms
(4) (2 + 5)2 - (2 - 5)2= ____.
[A] 820
[B] 1455
[C] 410
[D] 2905
Answer: 2905
(5) The 6th term from the end, in the expansion of (x + a)14 is ____
[A] 10th term from the beginning
[B] 9th term from the beginning
[C] 6th term from the beginning
[D] 8th term from the beginning
Answer: 10th term from the beginning
(6) The expression 7c0 + 7c1 + 7c2 + 7c3 + ... + 7c7is equal to ____
[A] 64
[B] 128
[C] 63
[D] 127
Answer: 128
(7) If the coefficients of the 6th and 9th terms in the expansion of (x + y)are equal, then n is ____.
[A] 15
[B] 13
[C] 6
[D] 9
Answer: 13
(8) The ratio of the coefficient of xn in the expansion of (1 + x)3n to the coefficient of xn in the expansion of (1 + x)3n-1is ____
[A] 2
[B] 3/2
[C] 2/3
[D] 1/2
Answer: 3/2
(9) If the coefficient of x3y8 and x8y3 in the expansion of (x + y)n is the same, then the value of n is ____.
[A] 10
[B] 11
[C] 5
[D] 13
Answer: 11
(10) The number of terms in the expansion of (x+y)6 + (x-y)6is ____
[A] 14
[B] 7
[C] 4
[D] 3
Answer: 4
(11) If the expansion of (x + a)n,n ε N has 22 terms, then, n is equal to ____
[A] 22
[B] 24
[C] 21
[D] 23
Answer: 21
(12) Number of terms in the expansion of (y2 + 2xy + x230is ____
[A] 31
[B] 43
[C] 61
[D] 91
Answer: 61
(13) If in the expansion of (1- x)2n - 1, the coefficient of xγ is Aγ, then Aγ - 1 + A2n - γ is ____.
[A] 1
[B] 5
[C] 0
[D] 3
Answer: 0
(14) The coefficient of x6 in the expansion (1 + x2 + x) (2 + x2)6is ____.
[A] 420
[B] 300
[C] 200
[D] 400
Answer: 400
(15) The coefficient of x5 in the expansion [1+X+X2+x3]13 is—
[A] 300
[B] 1000
[C] 2000
[D] 2728
Answer: 2728
(16) 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
Answer: n = 2r
(17) The two successive terms in the expansion of (1 + x)24 whose coefficients are in the ratio 1 : 4 are
[A] 3rd and 4th
[B] 4th and 5th
[C] 5th and 6th
[D] 6th and 7th
Answer: 5th and 6th
(18) The coefficients of xn 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
Answer: 2:1
(19) If the coefficients of 2nd, 3rd and the 4th 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
Answer: 7
(20) If A and B are coefficients of  xn   in the expansions of (1 + x)2n and (1 + x)2n respectively, then A/B  equals to
[A] 1
[B] 2
[C] 1/2
[D] 1/n
Answer: 2

Take Mock Tests

Missiles Mock Test Start Test!
SSC MTS Mock Test Start Test
IBPS CLERK MOCK TEST Start Test
SSC MTS 2022 JULY 26 Shift 1 (ENGLISH) Start Test!
SSC GD Previous Year Paper 2021 Nov 17 Shift - I (Hindi) Start Test!
SSC CGL Tier - 1 PYP 2022 April 21 Shift- 1 (ENGLISH) Start Test!
MPSC PAPER I MOCK TEST 1 (ENGLISH) Start Test!
IB Security Assistant Mock test 1 (english) Start Test!
UP POLICE CONSTABLE MOCK TEST 1 Start Test!
DELHI POLICE CONSTABLE MOCK TEST 1 (HINDI) Start Test!

Chapters