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प्रश्न
If x = `"a"("t" - 1/"t")`, y = `"a"("t" + 1/"t")`, where t be the parameter, then `("d"y)/("d"x)` = ?
विकल्प
`x/y`
`(-x)/y`
`y/x`
`(-y)/x`
उत्तर
`bb(x/y)`
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