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If y=(x+sqrt(x^2+a^2))^n ,t h e n(dy)/(d...

If `y=(x+sqrt(x^2+a^2))^n ,t h e n(dy)/(dx)` is (a)`(n y)/(sqrt(x^2+a^2))` (b) `-(n y)/(sqrt(x^2+a^2))` (c)`(n x)/(sqrt(x^2+a^2))` (d) `-(n x)/(sqrt(x^2+a^2))`

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