If the function f(x)= ax - x 2,(a>2) , then f(x + y) + f(x – y) i… - Vidyadip

MCQ

If the function$ \text{f}(\text{x})=\frac{\text{ax} -{\text{x}}}{2,(\text{a>2})}$, then $ \text{f}(\text{x + y}) + \text{f}(\text{x – y})$ is equal to:

✓
$ 2\text{f}(\text{x} ) \text{ f}(\text{y})$
B
$ \text{f}(\text{x} ) \text{ f}(\text{y})$
C
$ \frac{\text{f} (\text{x})}{\text{f}(\text{y})}$
D
$ \text{None of these} $

✓

Answer

Correct option: A.

$ 2\text{f}(\text{x} ) \text{ f}(\text{y})$

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