√x2+y2 = aetan-1(y/x) , a>0 then y''(0) :
a) a/2.e-Ï€/2
b) aeπ/2
c) -2/a.e-Ï€/2
d) none
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2 Answers
Joydoot ghatak
·2010-10-12 21:22:17
@ shanks...
i think it is not a problem of differential equatn...bt a problem of differenciation...