Question 6 - A-Level Maths

Exam Board	OCR MEI
Module	Paper 2 (Paper 2)
Year	2020
Session	November
Topic	Generalised Binomial Theorem
Type	Expand and state validity

Find the first three terms in ascending powers of \(x\) of the binomial expansion of \(( 1 + 4 x ) ^ { \frac { 1 } { 2 } }\).
State the range of values of \(x\) for which this expansion is valid.