1)y=1/1+x^2; 2)y=2sinx найти производную.

[latex]1)y=1/(1+x^2) \\ y'=( \frac{1}{(1+x^2)^2)} )'= \frac{(1+x^2)-(2x)}{(1+x)^2} = \frac{x^2-2x+1}{(1+x^2)^2}= \frac{x^2-2x+1}{x^4+2x^2+1} [/latex] [latex]2)y=2sinx \\ (uv)'=u'v+uv' \\ y'=2cosx \\ [/latex]