Let Tgt0 be a fixed real number. Suppose...

Let `Tgt0` be a fixed real number. Suppose f is a cintinuous function such that ` f(x+T) = f(x) "for all" x in R`. If `I=underset(0)overset(T)int f(x)dx,` then the vlaue of `underset(3)overset(3+3T)int f(2x)dx` is

A

`3/2 I `

B

`2I `

C

`3I `

D

`6I `

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The correct Answer is:

C

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