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please solve and show work clearly for both a and b
Use an appropriate substitution to solve the given differential equation. 4. a) (x3y) dx - (3x +y) dy = 0 b) y(x +y+ 1)2 dr
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(nt 3y) dr - (3 x+y )dy-o (n+34) dru(3n+y)ay (K#34 Qa) dal Buty 1+ 3() doi dn (4n) 3-t +3 1+3 2. dus 3-t 3+V dr Seed dir CS C9+(+e t+u)(I-u) da- d ((+6 )(I-6) (-U L + L + (- du du 2 bsth ides wt have wdteqating dn du 2. 2ln(s) t(+u] = nn + lc -n(-)n(ис (1-) 2 C C. whne C us comstaut C b) Pur dOds dn dy dis :. О beceme dus -= dn dn dx Juckauatiug betaides cS Scanned wit Camtauiv back tyt Paotiung tant (xty X+C Au tan (xty+1)+c Censtaud integetion CS Scanned with CamScanner

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