1.

(d ^(2) x)/(dy ^(2))equals :

Answer»

`1/(((DY)/(DX))^2)`
`(((d^2y)/(dx)))/(((dy)/(dx))^2)`
`((d^2y)/(dx^2))`
`(-((d^2y)/(dx)))/(((dy)/(dx))^2)`

ANSWER :D


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