How to find derivative of f(x)=(2x^2+1)/(2x^2-1)

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We have to find the derivative of f(x)=(2x^2+1)/(2x^2-1)

We use the quotient rule here, which gives the derivative of f(x)/g(x) as

(f'(x)*g(x)* - f(x)*g'(x))/(g(x))^2


f'(x) = [(2x^2+1)'*(2x^2-1) - (2x^2+1)*(2x^2-1)']/(2x^2-1)^2

=> [4x*(2x^2-1) - (2x^2+1)*4x]/(2x^2-1)^2

=>  [8x^2 - 4x - 8x^2 - 4x]/(2x^2-1)^2

=>  -8x/(2x^2-1)^2

The required result is -8x/(2x^2-1)^2

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