Question

PLEASE HELP A GIRL OUT!
Which function has the greatest maximum y-value?

Answer 1

And where are the functions Girl??

Answer 2

@Abmon98

Answer 3

maximum would be the highest point

Answer 4

f(x)

Answer 5

are you sure, @AndreyZn ?
are you just going to give out answers and not justify them mathematically?

Answer 6

I'm sure. I thought @dsdasd will ask me about it, but ok.
f(x) - maximum will be when 3cos2x will be max, it will be max, when cos2x max. max value of cos2x is 1. => 3cos2x+4 maximum is 7.
g(x). from the grafic it's 3
h(x). from the table it's -2
so maximum is 7

Answer 7

\[y=3\cos(2x)+4 \]
\[-1 \le \cos2x \le 1\rightarrow-3\le3\cos2x \le3\rightarrow 1\le3\cos2x+4\le7\]
\[\max=7 \]\[\min=1 \]

Answer 8

andreyzn is correct, just took the test :)