- #1
Jishent
- 5
- 0
I am self studying for my AP Calc exam. I have just started on integration and I need a few pointers for a few questions. So here it is...
y= (e^x)/(1+(e^x)^2)
So I set u=e^x
du=e^x
then I am stuck.
the second question is (btw [{( are all used as parentheses to make it abit less confusing)
y=(x^2)/[{(x^3)+1)}^12]
I setted u=(x^3)+1
du=3x^2
(1/3)du = (x^2)dx
(1/3)integral sign [1/(u^12)]du
stuck there after
and 3
y=[(lnx)^3]/x
do i set x as u? or lnx?
Last of all I have no clue on number 4 which is
y=sin(2x)*e^[cos(2x)]
Many thanks!
y= (e^x)/(1+(e^x)^2)
So I set u=e^x
du=e^x
then I am stuck.
the second question is (btw [{( are all used as parentheses to make it abit less confusing)
y=(x^2)/[{(x^3)+1)}^12]
I setted u=(x^3)+1
du=3x^2
(1/3)du = (x^2)dx
(1/3)integral sign [1/(u^12)]du
stuck there after
and 3
y=[(lnx)^3]/x
do i set x as u? or lnx?
Last of all I have no clue on number 4 which is
y=sin(2x)*e^[cos(2x)]
Many thanks!