How do you find the instantaneous rate of change of #y=4x^3+2x-3# at #x=2#?
The answer is:
The instantanous rate of change of the function
Do you have rules for differentiation or are you using the definition? (a definition)
Important: You'll get the same answer either way, but I don't know where you are in your study of calculus.
If you are using a definition, it's probably one of the two below:
Trying to evaluate this limit by substitution gives indeterminate form:
Use the definition:
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