А)производная -4х^3+10х
Б)производная 5х^4-5
<span>log3(x^2-11x+27)=2</span>
<span><span>log3(x^2-11x+27)=log3 9</span></span>
<span><span>(x^2-11x+27=9</span></span>
<span><span>x^2-11x+18=0</span></span>
<span><span>x1=9</span></span>
<span><span>x2=2</span></span>