Need help with assignment, please help

[thelazyman]

Hi, I need help with three questions, tried them, attempted them and failed:S.


#1. Evaluate if the limit exists.

lim 5^3-2x
x-----> infinity

#2 Find f''(X) if f(x) = 2 + x - X^2/ (x-1)^2


#3 Find y'' if x^3 + y^3 = 4

Please anyone out their help me out with them, I try to do number 2 and my answer takes up 3 pages:s.

 

[stapel]

...three questions, tried them, attempted them...and my answer takes up 3 pages:s.

Could you give us at least a hint of what you've tried...?

Thank you.

Eliz.

 

[Gene]

Rather than guess on the first two:
#1. Do you mean
lim 5^(3)-2x
x-----> infinity
or
lim 5^(3-2x)
x-----> infinity

#2 Do you mean
f(x) = 2 + x - (X^2/(x-1)^2)
or
f(x) = (2 + x - X^2)/(x-1)^2