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The integrating factor of x(dy/dx) – y = x2 is _____ (a) -1/x(b) 1/x(c) log x (d) x |
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Answer» (b) 1/x x(dy/dx) - y = x2 ⇒ dy/dx - y/x = x IF = e\(\int\)-1/x dx = e-logx = 1/x |
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