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If y(dy)/(dx) = x[(y^(2))/(x^(2)) +(phi(...

If `y(dy)/(dx) = x[(y^(2))/(x^(2)) +(phi((y^(2))/(x^(2))))/(phi'((y^(2))/(x^(2))))], x ge 0, phi gt 0`, y(1) = -1, then `phi((y^(2))/(4))` is equal to :

A

`phi(1)`

B

`4 phi(1)`

C

`4 phi(2)`

D

`2phi (1)`

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