Объяснение:
1.
f(x)=x³+3x²+3
f'(x)=(x³+3x²+3)'=3x²+6x
f'(x)=3x²+6x=0
3x*(x+2)=0 |:3
x*(x+2)=0
x₁=0.
x+2=0
x₂=-2.
2.
f(x)=1-sinx
f'(x)=(1-sinx)'=-cosx
f'(x)=-cosx=0
cosx=0
x=π/2+πn.
3.
f(x)=5x*(x²-2x)=5x³-10x²
f'(x)=(5x³-10x²)'=15x²-20x
f'(x)=15x²-20x=0
15x²-20x=0
5x*(3x-4)=0
5x=0 |:5
x₁=0
3x-4=0
3x=4 |:3
x₂=4/3.
4.
ОДЗ: (х+1)²≠0 х+1≠0 х≠-1. ⇒
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Verified answer
Объяснение:
1.
f(x)=x³+3x²+3
f'(x)=(x³+3x²+3)'=3x²+6x
f'(x)=3x²+6x=0
3x*(x+2)=0 |:3
x*(x+2)=0
x₁=0.
x+2=0
x₂=-2.
2.
f(x)=1-sinx
f'(x)=(1-sinx)'=-cosx
f'(x)=-cosx=0
cosx=0
x=π/2+πn.
3.
f(x)=5x*(x²-2x)=5x³-10x²
f'(x)=(5x³-10x²)'=15x²-20x
f'(x)=15x²-20x=0
15x²-20x=0
5x*(3x-4)=0
5x=0 |:5
x₁=0
3x-4=0
3x=4 |:3
x₂=4/3.
4.
ОДЗ: (х+1)²≠0 х+1≠0 х≠-1. ⇒