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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Priyadarshan Choursiya Best Answer
this is simplest form of Leibnitz rule(duis rule) https://youtu.be/CUSwPJXXDl8 https://youtu.be/5CbUAzO4JIM https://youtu.be/pqP13eLG35U https://youtu.be/D2oZmIiw9Kc https://youtu.be/QGTdWNVtE_8 please visit 1 and second video. your all doubt are clear and you find more examples like this.