JEE MATHEMATICS MCQ: SEQUENCE OF SERIES

1 Easy

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Application +4 | -1

5^{1+x}+5^{1-x}, \frac{a}{2}

and

25^x+25^{-x}

are three consecutive terms of an A.P., then the values of

a

are given by

View answer and explanation

Correct option: A

a \geq 12

Option A (

a \geq 12

) is correct because the expression can be rewritten as a sum of squares plus 12, which is always greater than or equal to 12.

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