Posted by **Marissa** on Monday, October 15, 2012 at 11:37pm.

Assuming that f and g are functions differentiable at a (though we do not know their formulas). Prove that f +g is differentiable at a using the definition of the derivative.

## Answer this Question

## Related Questions

- Calculus - Decide if the following function f(x) is differentiable at x=0. Try ...
- General Calculus Question - On a graph what ways can it not be differentiable? I...
- calculus - Consider the function f(x) = piecewise [(x^3)(cos(1/x)) , x=/=0], [0...
- calculus - Assume that x and y are differentiable functions of t. Find dy/dt ...
- MATH - Where are the functions f1(x)=|sin(x)| and f2(x) = sin(|x|) ...
- Math--Calculus - I'm having a tough time figuring out this problem... S(x) = ...
- calc - Which of the following statements would always be true? I. If f is ...
- Math - Where are the functions f1(x)=|sin(x)| and f2(x) = sin(|x|) ...
- Calculus - if u and v are differentiable functions, then does d(uv) = dudv
- calculus - find f' for each of the following where g and k are differentiable ...