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26 December, 00:18

What is the largest value in the sequence generated by the formula an = - n2 + 6n - 7?

A. 1

B. 2

C. 3

D. 4

+1
Answers (1)
  1. 26 December, 00:38
    0
    Derive the equation and equate the derivative to zero.

    dan/dt = - 2n + 6 = 0

    The value of n in the equation is 3. We substitute 3 to the original equation,

    an = - (3) ² + 6 (3) - 7 = 2

    The answer to this item is letter B.
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