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प्रश्न
Choose the correct alternative:
For a demand function p, if `int "dp"/"p" = "k" int ("d"x)/x` then k is equal to
विकल्प
ηd
-ηd
`(-1)/eta_"d"`
`1/eta_"d"`
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उत्तर
`(-1)/eta_"d"`
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