Question

If f(x)=2x-3 then find the expression given by f(a+h)-f(a)/h
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Answer 1

`\text{Given that,}~ f(x) =2x-3\\\\(f(a+h) - f(a))/(h)\\\\=((2(a+h)-3)-(2a-3))/(h)\\\\=\frac{2a+2h-3-2a+3}h}\\\\=(2h)/(h)\\\\=2`