" let f(r)r snz, e r. then |f| is [question id = 26030] differentiable at r =t [option id 44117] . differentiable at a = 0 2. [option id = 44115] uniformly cont

" Let f(r)r snz, E R. Then |f| is [Question ID = 26030] differentiable at r =T [Option ID 44117] . differentiable at a = 0 2. [Option ID = 44115] uniformly continuous on k [option ID = 44118] differentiable at z = -T 4. [Option ID = 44116]