(a) Simplify
$\[\dfrac{\dbinom{n}{k}}{\dbinom{n} {k - 1}}.\]$
(b) For some positive integer...
Mathematics, 31.01.2022 19:20 maxi12312345
(a) Simplify
$\[\dfrac{\dbinom{n}{k}}{\dbinom{n} {k - 1}}.\]$
(b) For some positive integer $n,$ the expansion of $(1 + x)^n$ has three consecutive coefficients $a,$ $b,$ $c$ that satisfy $a:b:c = 1:7:35.$ What must $n$ be?
Answers: 3
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