2.3a Lösning 7d
Från Mathonline
\( \displaystyle \lim_{h \to 0}\,\,{f(x+h) - f(x) \over h} \,=\, \lim_{h \to 0}\,\,(3\,x^2 + 3\,x\,h + h^2) \,=\, 3\,x^2 \)
\( \displaystyle \lim_{h \to 0}\,\,{f(x+h) - f(x) \over h} \,=\, \lim_{h \to 0}\,\,(3\,x^2 + 3\,x\,h + h^2) \,=\, 3\,x^2 \)