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- Thread starter petebob6
- Start date
\(\displaystyle \mbox{ f(x) = 10x - 15}\)
and
\(\displaystyle \mbox{ f(x + h) = 10(x + h) - 15}\)
so
\(\displaystyle \mbox{ \frac{f(x + h) - f(x)}{h} = \frac{(10(x + h) - 15) - (10x - 15)}{h}}\)
Simplify the numerator, and hence the quotient.
and
\(\displaystyle \mbox{ f(x + h) = 10(x + h) - 15}\)
so
\(\displaystyle \mbox{ \frac{f(x + h) - f(x)}{h} = \frac{(10(x + h) - 15) - (10x - 15)}{h}}\)
Simplify the numerator, and hence the quotient.