1. ------------------- -5--------------------- -2-------------------2----------------------
+ +
2.f(x)=x³-2x²+x+3
f'(x)=3x²-4x+1 √D=√16-12=2
x1=1/6[4+2]=1 x2=1/3
----------------------1/3-----------------------1----------------------
+↑ -↓ +↑
f(0)=3 f(3/2)=27/8-2*9/4+3/2+3=3,375 f(1)=1-2+1+3=3
наиб. у=3,375 наим. у=3
4. 2x+y=20 y=20-2x xy=20x-2x² max x0=-20/-4=5 smax=10*5=50
