Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • If the sum of the coefficients in the expansion of  <img alt="(x-2 y+3 z)^n" src="https://ent

If the sum of the coefficients in the expansion of  (x-2 y+3 z)^n  is 128 then the greatest coefficient in the expansion of  (1+x)^nis

 

Option: 1

35


Option: 2

20


Option: 3

10


Option: 4

None of these 


Answers (1)

best_answer

Sum of the coefficient in the expansion

(x-2 y+3 z)^n \text { is }(1-2+3)^n=2^n

\therefore 2^n=128 \Rightarrow n=7

Therefore, greatest coefficient in the expansion of (1+x)^7 is { }^7 C_3 or { }^7 C_4 because both are equal to 35.

 

Posted by

jitender.kumar

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main Marks vs Percentile 2025: How many marks do you need to score 95+ percentile?
anam-khan

JEE Main 2025 session 1 official answer key out; challenge by February 6; how to calculate NTA score?
anam-khan

JEE Main 2025: NIT Raipur's CSE cut-offs drop; closing ranks in popular branches

Latest Question