8 Replies
@Apu
Note for OP
+solved @user1 @user2...
to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.Just write up the relations na once
And then try substituting eliminating
Lemme try holup

Apologies in advance for the crappy handwriting.

Yups exactly same
wouldnt it be easy if u take a/r^2 ,a/r, ar and ar^2
or may be a/r ,a , ar, ar^2