Taylor series problem (non-direct differentiation?)

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SUMMARY

The discussion centers on solving a calculus problem involving the Taylor series expansion of the function \(\sin(7x)\). Instead of using direct differentiation, the optimal approach is to multiply the Taylor series of \(\sin(7x)\) by \(x^3\). This method simplifies the problem significantly, providing a more efficient solution. The participant expresses gratitude for discovering this straightforward technique.

PREREQUISITES
  • Understanding of Taylor series expansion
  • Knowledge of trigonometric functions, specifically \(\sin(x)\)
  • Basic calculus concepts, including differentiation
  • Familiarity with polynomial multiplication
NEXT STEPS
  • Study the Taylor series expansion of \(\sin(x)\) and its applications
  • Learn about polynomial multiplication techniques in calculus
  • Explore alternative methods for solving calculus problems without direct differentiation
  • Investigate the implications of using Taylor series in approximation theory
USEFUL FOR

Students studying calculus, educators teaching Taylor series, and anyone looking to enhance their problem-solving techniques in mathematical analysis.

Loopas
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I attached a picture of the problem from my online HW. I know how to solve the problem through direct differentiation, but that would too long to find the derivatives for this problem, and the problem actually suggests that I find another way. So my question is, what's the best way to solve this?
 

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Loopas said:
I attached a picture of the problem from my online HW. I know how to solve the problem through direct differentiation, but that would too long to find the derivatives for this problem, and the problem actually suggests that I find another way. So my question is, what's the best way to solve this?

Multiply the Taylor series of [itex]\sin(7x)[/itex] by [itex]x^3[/itex].
 
Thank you... wouldve never guessed it was so simple.
 

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