MCQOPTIONS
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MCQOPTIONS
| 1. |
The integrating factor of equation \({\sec ^2}y\frac{{dy}}{{dx}} + x\tan y = {x^3}\) is |
| A. | \({e^{\frac{{{x^2}}}{2}}}\) |
| B. | \({e^{ - \frac{{{x^2}}}{2}}}\) |
| C. | \({e^{\frac{x}{2}}}\) |
| D. | \({e^{ - \frac{x}{2}}}\) |
| Answer» B. \({e^{ - \frac{{{x^2}}}{2}}}\) | |