Indefinite Integration 2 Question 2

2. Let T>0 be a fixed real number. Suppose, f is a continuous function such that for all xR.f(x+T)=f(x). If I=0Tf(x)dx, then the value of 33+3Tf(2x)dx is

(2002,1M)

(a) 32I

(b) I

(c) 3I

(d) 6I

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Answer:

Correct Answer: 2. (c)

Solution:

  1. 33+3Tf(2x)dx Put 2x=ydx=12dy

1266+6Tf(y)dy=6I2=3I



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