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    Hey, I would really appreciate if someone could help me with these exercises. I have the answers but i dont know how to do the questions because I missed several lessons so if anyone could tell me how to work through them or show some working out that would be great
    https://ibb.co/mWgnyS
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    (Original post by Fairly7Local)
    Hey, I would really appreciate if someone could help me with these exercises. I have the answers but i dont know how to do the questions because I missed several lessons so if anyone could tell me how to work through them or show some working out that would be great
    https://ibb.co/mWgnyS
    For the first one, look up the definition of differentiability at a point. For f to be differentiable at x=1, the limit \displaystyle \lim_{h \rightarrow 0} \dfrac{f(1+h)-f(1)}{h} must exist. In order for it to exist, we must have \displaystyle \lim_{h \rightarrow 0_-} = \lim_{h \rightarrow 0_+} (ie approaching from either side of 1 yields the same limit). This is sufficient to answer the question.
 
 
 
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