Can you help me answer this equation?

1 1
__ - __
x+h x


Your algebraic expression did not get printed out in a recognizable form. It is better is you use parentheses and brackets, and try to type it in a single line. If what you are looking for is
[(1/(x+h)- 1/x]/h, then rewrite it as
(1/h)* [x - (x+h)]/[x(x+h)]
= (1/h)*(-h)/[x(x+h)]
= -1/[x(x+h)]

why are parentheses used in mathematicas????

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