info@clay6.com
+91-9566306857
(9am to 6pm)
logo

Ask Questions, Get Answers

X
Want help in doing your homework? We will solve it for you. Click to know more.
 
Home  >>  JEEMAIN and NEET  >>  Mathematics  >>  Class12  >>  Differential Equations

The two curves represents by $9yy'+4x=0,\; y(0)=2,\; yy'+x=0,\; y(0)=3$ then number of common normals for two curves will be

$(a)\;1 \\ (b)\;2 \\ (c)\;3 \\ (d)\;4 $

1 Answer

Need homework help? Click here.
$9yy'+4x=0$
$9ydy=-4xdx$
$\large\frac{x^2}{9}+\frac{y^2}{4}$$=1$ for $y(0)=2$
$yy'+x=0$
$y \large\frac{dy}{dx}$$+x=0$
$x^2+y^2=9$ for $y(0)=3$
So 4 is the correct answer.
Hence d is the correct answer.
answered Feb 7, 2014 by meena.p
 
...