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Alchen [17]
3 years ago
8

Please help! will mark brainliest!

Mathematics
1 answer:
laiz [17]3 years ago
8 0

Answer:

-12x²

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Distributive Property

<u>Algebra I</u>

  • Function Notation
  • Combining Like Terms
  • Factoring
  • Expanding by FOIL (First Outside Inside Last)

<u>Calculus</u>

  • Evaluating Limits
  • Definition of a Derivative: f'(x)= \lim_{h \to 0} \frac{f(x+h)-f(x)}{h}

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = 1 - 4x^3

<u>Step 2: Differentiate</u>

  1. Substitute [DOD]:                                                                                          f'(x)= \lim_{h \to 0} \frac{[1-4(x+h)^3]-(1-4x^3)}{h}
  2. Expand:                                                                                                           f'(x)= \lim_{h \to 0} \frac{[1-4(x^3+3hx^2+3h^2x+h^3)]-(1-4x^3)}{h}
  3. Distribute:                                                                                                        f'(x)= \lim_{h \to 0} \frac{1-4x^3-12hx^2-12h^2x-4h^3-1+4x^3}{h}
  4. Combine like terms:                                                                                       f'(x)= \lim_{h \to 0} \frac{-12h^2x-4h^3-12hx^2}{h}
  5. Factor:                                                                                                             f'(x)= \lim_{h \to 0} \frac{h(-12hx-4h^2-12x^2)}{h}
  6. Divide:                                                                                                             f'(x)= \lim_{h \to 0} -12hx-4h^2-12x^2
  7. Evaluate:                                                                                                         f'(x)= \-12x^2
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