Binomial TheoremHard
Question
If k ∈ R and the middle term of 
is 1120, then value of k is:
is 1120, then value of k is:Options
A.3
B.2
C.-3
D.-4
Solution
middle term = T5
T5 = T4 + 1 = 8C4 . k4 = 1120
⇒ k = 2
T5 = T4 + 1 = 8C4 . k4 = 1120
⇒ k = 2
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