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Frigus
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My question is as it is as you have read in the heading and please tell me in taking mind that I am not a calculus master but just a beginner.
Sir I understand it but I was watching this mit lecture in which that sir told (at 0:30)that we write it as positive because this is how we define differential but it didn't made any sense to me so to clarify it I posted this thread.PeroK said:If ##dM## is a negative quantity, as Resnick states, then ##M + dM## is correct.
E.g. suppose ##M = 100kg## and ##dM = -1 kg##, then the new mass is:
##M' = M + dM = 100kg + (-1kg) = 99kg##
Hemant said:Sir I understand it but I was watching this mit lecture in which that sir told (at 0:30)that we write it as positive because this is how we define differential but it didn't made any sense to me so to clarify it I posted this thread.
Can you please explain the point that he wanted to explain.