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x and y are the sides of two square such...

x and y are the sides of two square such that `y=x-x^(2)`. The rate of change of area of the second square with respect to that of the first square is

A

`2(1-x^2)x`

B

`2x^2-3x+1`

C

`2(2x^2-3x+1)`

D

None of these

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The correct Answer is:
B
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