joshxg227
07.05.2020 •
Mathematics
5x-4\geq 12 \quad \maroonC{\text{ AND}} \quad 12x+5\leq-45x−4≥12 AND12x+5≤−4
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Ответ:
f(x)=-x²
1)
f(x)=(x+4)²
f'(x)=2(x+4)=0=>x=-4 not 0
2)
f(x)=x²-4x
f'(x)=2x-4=0==>x=2 not 0
3)
f(x)=x²-16
f'(x)=2x=0==>x=0 and y=0²-16=-16 not 0
4)
f(x)=-x²
f'(x)=-2x=0==>x=0 and y=-0²=0 ok