Edexcel IAL WMA12/01/P2/Jan 2021/Q4 (Binomial Expansion)
Find the first three terms, in ascending powers of x, of the binomial expansion of
where p is a constant. Give each term in simplest form.
(4)
Given that in the expansion of
the coefficient of
find the possible values of p.
(4)
SOLUTION
a- Using binomial theorem to find the first 4 terms of the expression.
Finding the first three terms separately and will then arrange them in the ascending order of power of x.
b- It is given that the coefficient of
Not expanding further as on multiplying we will get x with a power greater than 2. Which is not required rightnow.
It is given in the question that the coefficient of
Where, on expansion of
