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```        Q- let T is not zero be a fixed number suppose f is a continuous function such that for all x belongs to R, f(x+T) + f(x). if
I = integration from (T to 0) f(x) dx, then the value of
Integration from (3 to 3+3T) f (2x) dx is?```
7 years ago

85 Points
```										Dear Kanika,

given, I = 0T∫ f(x) dx
3+3T3∫ f(2x) dx  = 3 0T∫ f(2x) dx     where T is the period of func. f(x)
let 2x = t or  2dx = dt
so,  3 0T∫ f(2x) dx =  3[ 0T∫ f(t) dt ] /2 = 3I/2
hence,  3+3T3∫ f(2x) dx = 3I/2

All the best.
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IIT Bombay
```
7 years ago
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