All flashcards
Flashcard 1: What substitution simplifies the integral of (2x+1)5?
Answer: u=2x+1. Let u=2x+1 to transform (2x+1)5 into u5 for easier integration.
Flashcard 2: What is the substitution for u if du=−sin xdx?
Answer: u=cos x. Since dxd(cosx)=−sinx, if du=−sinxdx, then u=cosx.
Flashcard 3: What is the integral of u1du?
Answer: ln ∣u∣+C. The antiderivative of u1 is ln∣u∣ plus the constant of integration.
Flashcard 4: Determine du for u=sin x in substitution.
Answer: du=cos xdx. The derivative of u=sinx is cosx, so du=cosxdx.
Flashcard 5: Determine du if u=tan x in substitution.
Answer: du=sec2xdx. The derivative of u=tanx is sec2x, so du=sec2xdx.
Flashcard 6: What is the integral of undu?
Answer: n+1un+1+C, n=−1. Use the power rule for integration: increase exponent by 1 and divide.
Flashcard 7: What is the integral of sin udu?
Answer: −cos u+C. The antiderivative of sinu is −cosu plus the constant of integration.
Flashcard 8: What substitution simplifies the integral of xcos(x2)?
Answer: u=x2. Let u=x2 so that du=2xdx matches the x factor in xcos(x2).
Flashcard 9: Determine du if u=x2−1 in substitution.
Answer: du=2xdx. The derivative of u=x2−1 is 2x, so du=2xdx.
Flashcard 10: Find u for substitution if du=x21dx.
Answer: u=−x1. Since dxd(−x1)=x21, if du=x21dx, then u=−x1.
Flashcard 11: Identify u for substitution if du=2xdx.
Answer: u=x2. Since dxd(x2)=2x, if du=2xdx, then u=x2.
Flashcard 12: Find u for substitution if du=cos xdx.
Answer: u=sin x. Since dxd(sinx)=cosx, if du=cosxdx, then u=sinx.
Flashcard 13: What is the integral of cos udu?
Answer: sin u+C. The antiderivative of cosu is sinu plus the constant of integration.
Flashcard 14: Find u for substitution if du=7x6dx.
Answer: u=x7. Since dxd(x7)=7x6, if du=7x6dx, then u=x7.
Flashcard 15: Determine du if u=ln x in substitution.
Answer: du=x1dx. The derivative of u=lnx is x1, so du=x1dx.
Flashcard 16: Determine du if u=3x4+2x in substitution.
Answer: du=(12x3+2)dx. The derivative of u=3x4+2x is 12x3+2, so du=(12x3+2)dx.
Flashcard 17: What substitution simplifies the integral of xex2?
Answer: u=x2. Let u=x2 so that du=2xdx matches the x factor in xex2.
Flashcard 18: Identify u for substitution if du=sec2xdx.
Answer: u=tan x. Since dxd(tanx)=sec2x, if du=sec2xdx, then u=tanx.
Flashcard 19: Identify u for substitution if du=exdx.
Answer: u=ex. Since dxd(ex)=ex, if du=exdx, then u=ex.
Flashcard 20: Determine du if u=2x3+1 in substitution.
Answer: du=6x2dx. The derivative of u=2x3+1 is 6x2, so du=6x2dx.
Flashcard 21: What is the integral of eudu?
Answer: eu+C. The antiderivative of eu is eu plus the constant of integration.
Flashcard 22: Identify du if u=x3 in substitution.
Answer: du=3x2dx. The derivative of u=x3 is dxdu=3x2, so du=3x2dx.
Flashcard 23: What substitution simplifies the integral of cos(x2)?
Answer: u=x2. Let u=x2 to simplify the argument of the cosine function.
Flashcard 24: Find u for substitution if du=x1dx.
Answer: u=ln x. Since dxd(lnx)=x1, if du=x1dx, then u=lnx.
Flashcard 25: What substitution simplifies the integral of (2x+1)5?
Answer: u=2x+1. Let u=2x+1 to transform (2x+1)5 into u5 for easier integration.
Flashcard 26: What is the substitution for u if du=−sin xdx?
Answer: u=cos x. Since dxd(cosx)=−sinx, if du=−sinxdx, then u=cosx.
Flashcard 27: Identify u for substitution if du=5x4dx.
Answer: u=x5. Since dxd(x5)=5x4, if du=5x4dx, then u=x5.
Flashcard 28: Determine du if u=ln(4x) in substitution.
Answer: du=x1dx. The derivative of u=ln(4x) is x1, so du=x1dx.
Flashcard 29: What is the integral of undu?
Answer: n+1un+1+C, n=−1. Use the power rule for integration: increase exponent by 1 and divide.
Flashcard 30: Determine du for u=sin x in substitution.
Answer: du=cos xdx. The derivative of u=sinx is cosx, so du=cosxdx.