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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Rohit kumar gupta
Just multiply the the position vector R on both side of the first eqaution you will get the second equatuon. Now again multiply by velocity Vi on both side in the equation first you will get the third equation. Now just put the value of Vi from the second equation and expand it. By simplyfing it you will get the equation fifth. It is just a mathematical calculation.
are bhai first Vr ko Change kiya fir differentiation krne pr 2w kaise aayega