AIEEE sample practice questions in seqeunces, series : AIEEE Math : Fermat Education - AIEEE Classes

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Sequences Series

Question 1
Expression P= x + x2 + x3 + ... + x215. The largest value of m such that xm+1 is a factor of P, is
  1. 72
  2. 216
  3. 108
  4. 6
Correct Answer is 108. Choice (3)

Explanatory Answer

The expression translates to (x^216-1)/(x-1).

(x108+1) is the right answer. Or choice (3)

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