с^9:с^4*c*c^2=с^9:(с^4*c*c^2)=с^9:c^7=c^2
В третьей четверти находится парабола
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Y`=-4/(x+1)²≠0
y(0)=4/1=4
y(3)=4/4=1-наим
<span>x^2-7x-7x-16+x^2=0
2x^2 -14x -16=0
x^2 - 7x - 8=0
D = 49 +32 = 81
x1 = 7 +9 /2 = 4
x2 = 7-9 /2 = -1</span>