Calculating indefinite integrals

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SUMMARY

The forum discussion focuses on calculating indefinite integrals for various functions. The integrals presented include S 13(4^x + 3^x)dx, S (cosx + sec^2x)dx, S (3-(1/x))dx, and S e^(7x)dx. The correct solutions are identified, with specific corrections noted for parts c) and d). For part d), the use of U-substitution is confirmed as necessary, with u=7x being the appropriate substitution.

PREREQUISITES
  • Understanding of basic integration techniques
  • Familiarity with U-substitution in calculus
  • Knowledge of logarithmic integration
  • Ability to differentiate between trigonometric functions and their integrals
NEXT STEPS
  • Study integration techniques for exponential functions, specifically S e^(kx)dx
  • Learn about U-substitution and its applications in integration
  • Review integration of trigonometric functions, focusing on S cos(x)dx and S sec^2(x)dx
  • Explore logarithmic integration, particularly S (1/x)dx and its implications
USEFUL FOR

Students studying calculus, particularly those focusing on integration techniques, as well as educators seeking to clarify common integration errors.

Cacophony
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Homework Statement


a) S 13(4^x + 3^x)dx
b) S (cosx + sec^2x)dx
c) S (3-(1/x))dx
d) S e^(7x)dx


Homework Equations



The S is supposed to be the integration sign

The Attempt at a Solution



Are these correct or at least close?

a) = 13((4^x)/(ln(4) + (3^x)/(ln(3))) + C

b) = (sinx + tanx) + C

c) = -ln + C

d) Do I use U-substitution for this one?
 
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c) and d) are incorrect. The integral of "3" is "3x". For d), yes, use substitution. Let u= 7x.
 

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