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The integrating factor of `(xdy)/(dx)-y=x^(4)-3x "is"`A. xB. log xC. `(1)/(x)`D. `-x` |
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Answer» Given that `x(dy)/(dx)-y=x^(4)-3x` `Rightarrow (dy)/(dx)-(y)/(x)=x^(3)-3` `"Here" P=-(1)/(x),Q=x^(3)-3` `IF=e^(intPdx)=e^(int(1)/(x)dx)=e^(-log x)` `=(1)/(x)` |
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