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\( f^{\prime}(x)=\lim \limits_{h \rightarrow 0} \frac{f(x+h)-f(x)}{h} \)
\( f(x)=\frac{3}{5}-4 x \)
\( f(x+h)=\frac{3}{5}-4(x+h) \)
\( f^{\prime}(x)=\lim \limits_{h \rightarrow 0} \frac{\frac{3}{5}-4(x+h)-\left(\frac{3}{5}-4 x\right)}{h}=\lim \limits_{h \rightarrow 0} \frac{\frac{3}{5}-4 x-4 h-\frac{3}{5}+4 x}{h} \rightarrow-4 \)
\( \mathrm{mfG} \)
Moliets