Find the derivative.
x^3 -2x -8
I use the lim(h->0) [f(x+h) - f(x)] / h. I got 3x^2
The ANSWER is supposed to be 3x^3 -2.
CAN YOU DO BACKWARD MATH OR SOMETHING TO FIND THE QUESTION FOR ME? IT'S DUE TOMORROW.
This question isn't in the textbook. It was in the whiteboard in school.
x^3 -2x -8
I use the lim(h->0) [f(x+h) - f(x)] / h. I got 3x^2
The ANSWER is supposed to be 3x^3 -2.
CAN YOU DO BACKWARD MATH OR SOMETHING TO FIND THE QUESTION FOR ME? IT'S DUE TOMORROW.
This question isn't in the textbook. It was in the whiteboard in school.
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The derivative is actually 3x² - 2.
By using the power rule for each individual term, we have:
d/dx (x³) - d/dx (2x) - d/dx (8).
This then turns into 3x² - 2.
When you were doing the derivative through the limit definition, you probably made a mistake.
I hope this helps!
Edit: It's not possible for the answer to be (3x³ - 2), It has to be 3x², since the derivative takes off a power of the term.
By using the power rule for each individual term, we have:
d/dx (x³) - d/dx (2x) - d/dx (8).
This then turns into 3x² - 2.
When you were doing the derivative through the limit definition, you probably made a mistake.
I hope this helps!
Edit: It's not possible for the answer to be (3x³ - 2), It has to be 3x², since the derivative takes off a power of the term.