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प्रश्न
Choose the correct alternative:
What is the rate of change of demand (x) of a commodity with respect to its price (y) if y = 10 + x + 25x3.
पर्याय
`10/(1 + 75x^2)`
`1/(1 + 75x^2)`
1 + 75x2
`(-1)/(1 + 75x^2)`
उत्तर
`1/(1 + 75x^2)`
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