1
y`=7^(-193-28x-x²)*ln7*(-28-2x)=0
7^(-193-28x-x²)>0 при любом х
-2x=28
x=-14
+ _
---------------(-14)-----------------
max
2
y`=2x-34+144/x=(2x²-34x+144)/x=0
x²²-17x+12=0
x1+x2=7 U x1*x2=12
x1=3 U x2=4
+ _ +
----------------(3)-------------------(4)------------------
max
3
y`=(2x-26)/(x²²-26x+182)ln2=0
2x=26
x=13
_ +
----------------(13)---------------
min
4
y`=(8-2x)/(-14+8x-x²)ln2=0
2x=8
x=4
+ _
---------------(4)---------------------
max
y(4)=log(2)(-14+32-16)+8=log(2)2+8=1+8=9