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suppose in a dark room a candle is burning, so darkness increases as we move away from the candle. from the below diagram can anyone derive a differential example to show the rate of change of darkness from candle to point B.

supposing darkness decreases by one unit for every meter and AB is 10 meter.

suppose in a dark room a candle is burning, so darkness increases as we move away from the candle. from the below diagram can anyone derive a differential example to show the rate of change of darkness from candle to point B.

supposing darkness decreases by one unit for every meter and AB is 10 meter.

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