Question

find the maximum y-value on the graph of y=f(x)

f(x)=-x^2+2x+5

Answer 1

can u find the vertex of this parabola?

Answer 2

f'=-2x+2 f'=0 -2x+2=0 x=1 max =(-(-1))^2+2*(-1)+5=4

Answer 3

so the answer is 4

Answer 4

yes

Answer 5

thanks so much

Answer 6

bye