hey can someone please see if I did this right,
x--> infinity, (4x+9) / (7x^2 +4x - 9)
take the derivative = 4 / 14x + 4
so would it be 0? if not i'm not sure what to do next.
and
the integral from 0 to infinity of 1 / (x(x^2)+5)
so i did 1 / x^3 + 5x then i can't take the derivative again b/c the numerator is 1. now i don't know what to do.
any help is much appreciated.
yes, it would be zero.
ok. you have two different things here. you said you had 1/(x(x^2) + 5), but if you expand that, you would have 1/(x^3 + 5) not 1/(x^3 + 5x). so i think you made a typo here. please correct it
the integral from 0 to infinity of 1 / (x(x^2)+5)
so i did 1 / x^3 + 5x then i can't take the derivative again b/c the numerator is 1. now i don't know what to do.
any help is much appreciated.