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Question
Choose the correct alternative:
If x = at2, y = 2at, then `("d"^2y)/("d"x^2)` = ?
Options
`1/("at"^3)`
`(-1)/(2"at"^3)`
`(-1)/("at"^2)`
`1/("at"^2)`
Solution
`(-1)/(2"at"^3)`
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