- #1
Altami
- 17
- 0
Homework Statement
Differentiate.
y=x^2 + 4x +3/(square root x)
and
H(x)=(x+x^-1)^3
Homework Equations
The Attempt at a Solution
For the first one I got x^3/2 + 4x^1/2 + 3x^-1/2
But I don't know if that is correct or where to go from here?
The second I really don't know what to do, I am not sure if I have to distribute the exponent 3 throughout the parenthesis? I really don't know what to do, if someone could give me a hint? Then I could work it out. A friend of mine got x^3 + 3x^2(x^-1) + 3x(x^-2) + x^-3. But I don't know how he got that? Could someone explain if he is right or how he got that?
Thanks.