Homework Statement
Hi everyone
im stuck with the following integration..
Homework Equations
integral of dx/(5-4x-(x^2))^(5/2)
The Attempt at a Solution
can anyone help me?
thanks
yea..and after i do anti-derivative i got
π [ (1/9)y^3 - (2/6)y^2 -y ]
which gives me a -16/9...
i just dun understand how come my answer is negative..
btw thanks for helping!
Yes i got to that part too but what happen to the radius (x)?
cuz after i multiply the radius with the dS and subsitute value 3 and 1 into y-value i got
-16/9..
the question is..
Find the areas of the surfaces generated by revolvin the curves about the indicated axes.
x = (1/3)y^(3/2) - y^(1/2), 1≦y≦3; revolved about y-axis
so i use the general formula "S = Integral 2π (radius)(dS)"
and the radiu in this case is x which is (1/3)y^(3/2) -...