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Let f:[-1,2] to [0,oo] be a continuous f...

Let `f:[-1,2] to [0,oo]` be a continuous function such that `f(x)=f(1-x), AA x in[-1,2]`. If `R_(1)=int_(-1)^(2) xf(x)dx and R_(2)` are the area of the region bounded by `y=f(x), x=-1,x=2` and the X-axis . Then,

A

`R_1=2R_2`

B

`R_1=3R_2

C

2R_1=R_2

D

3R_1=R_2

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