F(x)= sqrt (x+1).
Formula: F(x+h) - F(x) / h
i cant seem to do this problem. i keep getting it wrong. so please help me
ok, good so far. from here, the trick is to multiply by the conjugate of the numerator over itself, then simplify
$\displaystyle \frac {\sqrt{x + h + 1} - \sqrt{x + 1}}h \cdot \frac {\sqrt{x + h + 1} + \sqrt{x + 1}}{\sqrt{x + h + 1} + \sqrt{x + 1}}$
can you take it from here?