Edexcel IAL /P2 /June 2019/Q4 (Binomial Expansion)
Find the first four terms, in ascending powers of x, of the binomial expansion of
(4)
Given that x is small, so terms in x4 and higher power of x may be ignored, show
Where a and b are constant to be found.
(3)
SOLUTION
a- Using binomial theorem to find the first 4 terms of the expression.
b-
Hence,
