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If y=tan^(-1){(sqrt(1+x^2)+sqrt(1-x^2))/...

If `y=tan^(-1){(sqrt(1+x^2)+sqrt(1-x^2))/(sqrt(1+x^2)-sqrt(1-x^2))}` , `-1 < x < 1, x!= 0 ` . Find `dy/dx`.

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