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how do you integrate 1/(x^{2} + 1)^{2} ?
i have tried integration by partial fractions but when you set 1 equal to (Ax +B)(x^{2}+1) + (Cx + D) this leads to A=B=C=0 and D=1 which just gives you the original equation
i have tried integration by partial fractions but when you set 1 equal to (Ax +B)(x^{2}+1) + (Cx + D) this leads to A=B=C=0 and D=1 which just gives you the original equation