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If a quantity y varies as the sum of thr...

If a quantity y varies as the sum of three quantities of which the first varies as x, the second varies as `-x+x^(2)` the third varies as `x^(3) - x^(2)` then what is y equal to ?

A

`kx^(3)` where k is a constant

B

`kx+ lx^(2) + mx^(3)`, where k,l,m are constants

C

` kx^2` where k is a constant

D

kx where k is a constant

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