How to solve
f'(a) = lim h→0 [f(a+h)−f(a)]/h. For x² this simplifies to 2a.
Steps
- Expand (a+h)² − a².
- Divide by h and let h → 0.
Example
f(x)=x², a=3
- f'(3)=6.
Answer: 6
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f'(a) = lim h→0 [f(a+h)−f(a)]/h. For x² this simplifies to 2a.
Steps
Example
f(x)=x², a=3
Answer: 6