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If =(sqrt(a^2+x^2)+sqrt(a^2-x^2))/(sqrt(...

If `=(sqrt(a^2+x^2)+sqrt(a^2-x^2))/(sqrt(a^2+x^2)-sqrt(a^2-x^2))` , show that `(dy)/(dx)=(2a^2)/(x^3){1+(a^2)/(sqrt(a^4-x^4))}` .

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