ПОМОГИТЕ СРОЧНО математика

Question

ПОМОГИТЕ СРОЧНО математика

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Answer 1

f'(x)=((x+2)/(x^2+1))'=((x+2)'(x^2+1)-(x+2)(x^2+1)')/(x^2+1)^2=(x^2+1-2x(x+2))/(x^2+1)^2=(x^2+1-2x^2-2x))/(x^2+1)^2=(-x^2+1-2x))/(x^2+1)^2;f'(0)=(-0^2+1-2*0))/(0^2+1)^2=1