Let F be defined by f(x)=x^3. then f(x+h)-f(x-h)/2h=? I plugged it into the calculator but it just gives me back the exact equation and not an answer?
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Originally Posted by Shanker Let F be defined by f(x)=x^3. then f(x+h)-f(x-h)/2h=? I plugged it into the calculator but it just gives me back the exact equation and not an answer? I've attached the screen-shot. Have a look at the input line. In this case the appropriate use of brackets is vital.
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