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If y = ax ^(4) + (b)/(x ^(3)), then (d ^...

If `y = ax ^(4) + (b)/(x ^(3)),` then` (d ^(2) y)/( dx ^(2)) =`

A

`12x^(2)//y`

B

`12y// x^(2)`

C

`12x ^(2) y`

D

none

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The correct Answer is:
B
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DIPTI PUBLICATION ( AP EAMET)-DIFFERENTIATION -EXERCISE 1D
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  7. If xy = ae ^(x) + be^(-x) then xy (2) + 2y (1) - xy =

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  11. If y = sin (log (e) x) then (x ^(2) (d ^(2) y)/(dx ^(2)) +x (dy )/(dx)...

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  12. If y =a cos (log x) + b sin (log x) then x ^(2) y (2) + xy (1)+y=

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  13. Cos^(-1) ((y)/(b)) =2 log "" ((x)/(2)) , x gt 0 implies x ^(2) (a ^(2)...

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  14. If y sqrt(1+ x ^(2)) = log ( x + sqrt( 1 + x ^(2))) then (1 + x ^(2))...

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  15. If y = ae ^(-bx) cos (cx +d) then y (2) + 2by(1) + (b ^(2) +c ^(2)) y...

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  16. If y = ax ^(n+1)+ bx ^(-n) then x ^(2) y (2) =

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  17. If y = ae ^(nx) + be ^(-nx) then y (2)=

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  18. If y = e ^(-kx //2) (a cos nx + b sin nx) then y (2)+ky(1)+ (n^(2) + k...

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  19. If y =a cos (sin x) + b sin (sin x) then y (2) + (tan x) y(1)=

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  20. f (x) = 10 cos x + (13 + 2x) sin x implies f''(x) + f(x) =

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