Question

The domain of the function f(x) = 3x3 is {2, 5} .
what is the range of the funtion ? The range of the function f(x) = 3x3 when its domain is {2, 5} is ...

Answer 1

Please, is your function, this?
\[f(x)=3x ^{3}\]

Answer 2

I edit it @Michele_Laino , its up there

Answer 3

Ok! your functionis continue, it's an increasing function and monotonic, so the range is the subsequent close interval of the real line:
[3*2^3, 3*5^3]=[24,375]

Answer 4

@sunnyday88

Answer 5

Im sorry im really confused . so 24,375 is the range ?

Answer 6

It's the image of the closed interval [2,5]. Nevertheless, as function, we can write:
\[x \rightarrow f(x)=3x ^{3}:\mathbb{R} \rightarrow \mathbb{R} \]

Answer 7

okay thankss

Answer 8

thanks!