Given the function f
(
x
)
=
x
3
−
6
x
2
,
f(x)=x
3
−6x
2
, find all intervals on which
f
f is concave up.

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)