(x^2+1)^2 dy + 20x dx = 0 Find Constant of Integration 'C' ,when x = 2 and y =7. Any help appreciated.
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Thanks very much for that , just a Quick Question you have a '-10' in front of the intergrand and then it diappears in the following line ,just wondering how that is the case. The neg sign I mean thanks again
Remember: $\displaystyle [{1/f(x)}]'=-{f(x)}'/f(x)^{2}$.So here: $\displaystyle [{10/(x^{2}+1})]'=10*[-2x/(x^{2}+1)^{2}]$
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