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If `y=y(x)`satisfies the differential equation `8sqrt(x)(sqrt(9+sqrt(x)))dy=(sqrt(4+sqrt(9+sqrt(x))))^(-1)dx ,x >0a n dy(0)=sqrt(7,)`then `y(256)=`16 (b)80 (c) 3(d) 9A. (a) 16B. (b) 3C. (c) 9D. (d) 80 |
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Answer» Correct Answer - (b) `dy/dx=1/(8sqrt(x)sqrt(9+sqrt(x))sqrt(4+sqrt(9+sqrt(x))))` `rArr y= sqrt(4+sqrt9+sqrt(x))+c` Now, `y(0)=sqrt(7)+c` `rArr c=0` `y(256)=sqrt(4+sqrt(9+16))=sqrt(4+5)=3` |
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