bharat bajaj12 Years agoSay,A = lim {f(1+x)/f(1) }^1/xln A = lim 1/x . ln( f(1+x)/f(1) )ln A = lim {ln f(1+x)/f(1)}/xUse L - Hospital rule...ln A = lim f`(1+x)/f(1+x)ln A = f`(1)/f(1)ln A = 6/3 = 2A = e^2Option (3) is correct...THanksBharat BajajIIT Delhiaskiitians faculty