Let a1,a2,a3,…,an be the integers which are not included in the rang – InterviewSolution

1.	Let a1,a2,a3,…,an be the integers which are not included in the range of f(x)=40(x−5)(x+1), where ai>ai+1 for each i=1,2,3,…,n. If n∑i=1 5−aiCi−1=xCy, then x+y can be
Answer» Let $a_{1}, a_{2}, a_{3}, \dots, a_{n}$ be the integers which are not included in the range of $f (x) = \frac{40}{(x - 5) (x + 1)},$ where $a_{i} > a_{i + 1}$ for each $i = 1, 2, 3, \dots, n$ . If $n \sum i = 1$ $^{5 - a_{i}} C_{i - 1} =^{x} C_{y}$ , then $x + y$ can be

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