If y=lnx, dy/dx=1/x (PDF Download) Oct 15, 2017 10:55:20 GMT Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Tiago on Oct 15, 2017 10:55:20 GMT If y=lnx, dy/dx=1/x (PDF Download)If ylnx dy_dx1_x proof _ Maths Proofs Video....pdf (96.88 KB)