Engineering Board Exam Reviewer · Trigonometric Integrals and Substitution · medium

Evaluate: 3≤ft(x ) ≤ft(x ),dx

1. 3≤ft(x )3 - ≤ft(x )+C
2. 3≤ft(x )3 + ≤ft(x )+C
3. 4≤ft(x )4 - 2≤ft(x )2+C
4. 4≤ft(x ) ≤ft(x )4+C

Answer

A. 3≤ft(x )3 - ≤ft(x )+C

Solution

3x x=( 2x-1) x x. Let u= x, du= x x,dx: (u2-1),du= 3x/3- x+C.

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