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Medium
In the expansion of (x+k)8(x + k)^8, where k∈Rk \in \mathbb{R}, the coefficient of the term x6x^6 is 112.
a
5 marks
Hint
Find the possible values of k.k.
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Binomial Theorem

Medium
In the expansion of (x+k)8(x + k)^8, where k∈Rk \in \mathbb{R}, the coefficient of the term x6x^6 is 112.
a
5 marks
Find the possible values of k.k.
Hint

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1. [Maximum mark: 7]
The expansion of (x+k)9(x + k)^9, where y>0y > 0, can be written as:
x9+ax8+bx7+cx6+…+y9x^9 + ax^8 + bx^7 + cx^6 + \ldots + y^9

where a,b,c,d,…∈Ra, b, c, d, \ldots \in \mathbb{R}.

(a)
Find an expression, in terms of yy for aa.
[2]

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TOPIC: QUADRATICSLEVEL 1
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