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Let T > 0 be a fixed real number. Suppos...

Let T > 0 be a fixed real number. Suppose f is a continuous function such that for all `x in R f(x + T) = f(x)`. If `I = int_6^T f(x) dx`, then the value of `int_(3)^(3 + 3T) f(2x)dx` is:

A

`3/2 I`

B

`2 I`

C

`3 I `

D

`6 I`

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The correct Answer is:
C
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