You're viewing 1 free preview question for Maths AA SL — subscribe to unlock 52 more, plus the Full Question Bank, Mock Papers & Worksheets.Upgrade

Binomial Theorem · Paper 2 — Free Maths AA SL Practice Questions

1MasterySAQ-SBinomial expansion and coefficientss6 marksPaper 2~9 min

In the expansion of

(2x + k)^7

, where

k \in \mathbb{Z}^+

, the coefficient of the

x^3

term is

22\,680

(a)

Calculate the value of

k

. [4 marks]

(b)

Hence, determine the coefficient of the

x^4

term in the expansion of

(2x + k)^7

. Binomial theorem:

(a+b)^n = \displaystyle\sum_{r=0}^{n} \binom{n}{r} a^{n-r} b^r

[2 marks]

Solutions

Questions 2-53

Unlock these questions with Premium

That's every free question here — 1 of 53.

+52 more questions, plus Mock Papers & Worksheets, are waiting in Premium.