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Differential Equations
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Form the differential equuations by eliminating arbitary constants given in brackets against each. $y^{2}=4ax [a]$
tnstate
class12
bookproblem
ch8
sec-1
exercise8-1
p129
q2
q2-1
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asked
Apr 14, 2013
by
poojasapani_1
edited
Apr 14, 2013
by
poojasapani_1
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1 Answer
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If we have an equation $f(x,y,c_1,c_2,....c_n)=u$ Containing n arbitrary constant $c_1,c_2...c_n$, then by differentiating n times, we get $(n+1)$ equations in total. If we eliminate the arbitrary constants $c_1,c_2....c_n,$ we get a D.E of order n
Step 1:
$y^2= 4ax$ -----(i)
$2y \large\frac{dy}{dx}$$= 4a$-----(ii)
Step 2:
Substituting from (ii) in (i)
$y^2= 2y \large\frac{dy}{dx}$$.x$
$2x \large\frac{dy}{dx}$$-y=0$
It is the required D.E
answered
Sep 3, 2013
by
meena.p
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