Questions
If in the expansion of are three consecutive coefficients, then n =
a
ac+ab+bcb2+ac
b
2ac+ab+bcb2−ac
c
ab+acb2−ac
d
none of these
detailed solution
Correct option is B
Here a=nCr,b=nCr+1 and c=nCr+2Put n = 2, r = 0, then option (b) holds the condition, i.e.,n=2ac+ab+bcb2−acTalk to our academic expert!
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lf the term independent of x in the expansion of is k, then 18k is equal to
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