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ChrisV Group Title Find the indefinite integral. 2 years ago 2 years ago Edit Question Delete Cancel Submit

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1. ChrisV
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$\int\limits_{?}^{?}xsin3x^2dx$

• 2 years ago
2. ChrisV
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so if i were using u substitution u = 3x^2??

• 2 years ago
3. ChrisV
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du/dt=6x??

• 2 years ago
4. ChrisV
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an du/6=xdx?

• 2 years ago
5. shivam_bhalla
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Yes you are right @ChrisV You get $\int\limits_{}^{} \sin (u) du = -\cos (u) +C$ $-\cos(u) +C = -\cos(3x^2 / 2) +C$

• 2 years ago
6. amistre64
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i tend to solve for dx outright; du/6x = dx and when you sub it in the xs cancel regardless

• 2 years ago
7. shivam_bhalla
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I forgot to divide the answer by 6

• 2 years ago
8. shivam_bhalla
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And also it is only 3x^2 and not 3x^2/2 . Sorry :P

• 2 years ago
9. ChrisV
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-1/6cos3x^2 +c

• 2 years ago
10. ChrisV
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?

• 2 years ago
11. shivam_bhalla
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Yes you are right @ChrisV

• 2 years ago
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