Question 88140
{{{(f(x + h) - f(x)) / h}}}
.
{{{((x + h)^2 + (x + h) - x^2 - x) / h}}}
.
{{{(x^2 + 2xh + h^2 + x + h - x^2 - x) / h}}}
.
{{{(2xh + h^2 + h) / h}}}
.
{{{2x + h + 1}}}