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Indefinite Integration

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1

Evaluate the indefinite integral: x1x4dx\int \frac{x}{\sqrt{1-x^4}} \, dx

A.arcsin(x2)+C\arcsin(x^2) + C
B.12arcsin(x2)+C\frac{1}{2}\arcsin(x^2) + C
C.14arcsin(x2)+C\frac{1}{4}\arcsin(x^2) + C
D.12arcsin(x4)+C\frac{1}{2}\arcsin(x^4) + C
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2

Evaluate the indefinite integral: x2x2+4dx\int \frac{x^2}{\sqrt{x^2+4}} \, dx.

A.x2x2+422lnx+x2+4+C\frac{x^2\sqrt{x^2+4}}{2} - 2\ln\left|x+\sqrt{x^2+4}\right|+C
B.x2+422lnx+x2+4+C\frac{\sqrt{x^2+4}}{2} - 2\ln\left|x+\sqrt{x^2+4}\right|+C
C.xx2+42+2lnx+x2+4+C\frac{x\sqrt{x^2+4}}{2} + 2\ln\left|x+\sqrt{x^2+4}\right|+C
D.xx2+422lnx+x2+4+C\frac{x\sqrt{x^2+4}}{2} - 2\ln\left|x+\sqrt{x^2+4}\right| + C
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3

Determine the indefinite integral: 1x2x4dx\int \frac{\sqrt{1 - x^2}}{x^4} \, dx

A.(1x2)3/23x3+C\frac{(1-x^2)^{3/2}}{3x^3} + C
B.1x23x3+C\frac{\sqrt{1-x^2}}{3x^3} + C
C.1x2x3+C-\frac{\sqrt{1-x^2}}{x^3} + C
D.(1x2)3/23x3+C-\frac{(1-x^2)^{3/2}}{3x^3} + C
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