Question 352119
{{{f(x)= 4x-2}}}
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{{{f(x+h)= 4(x+h)-2}}}
{{{f(x+h)=4x+4h-2}}}
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{{{f(x+h)-f(x)=4x+4h-2-(4x+2)}}}
{{{f(x+h)-f(x)=4x+4h-2-4x+2}}}
{{{highlight(f(x+h)-f(x)=4h)}}}