JEE Main 2019 — Math solution | Fundamenthol

JEE Main2019Math

Q.

Let $f (x) = 0 \int x g (t) d t$ where g is a non-zero even function. If f(x + 5) = g(x), then $0 \int f f (t) d t$ equals:

A
$x + 5 \int 5 g (t) d t$
B
$2 5 \int x + 5 g (t) d t$
C
$5 \int x + 5 g (t) d t$
D
$5 x + 5 \int 5 g (t) d t$

Solution

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