Definition of derivative? – math.stackexchange.com 14:08 Posted by Unknown No Comments Let $y= \begin{cases} 2x^2+x+1 & x\leq 0 \\ ax+b & x > 0 \end{cases} $ Determine $a,b$ such that $y$ has a derivative at $0$. So, I used the definition of the ... from Hot Questions - Stack Exchange OnStackOverflow via Blogspot Share this Unknown
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