1.

If x = phi (t), y = Psi(t) then (d^2y)/(dx^2) is

Answer»

`(phi^1Psi^(11)-PSI^(1)phi^(11))/((phi^(1))^2)`
`(phi^1Psi^(11)-Psi^(1)phi^(11))/((phi^(1))^3)`
`(phi^(11))/(Psi^(11))`
`(Psi^(11))/(Psi^(11))`

Answer :B


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