Well come.Please see these steps carefully.
(lim x...>∞(x3+x+1/x4-x+1)
taking x3 and x4 common 4m numerator & denominator respectively
=lim x...>∞[x3(1+1/x2+1/x3)/x4(1-1/x3+1/x4)]
x3 and x4 will cancel each other which comes 1/x
=lim...
Thanks you sir.
Basic definition is:Change in length/original length.So change in length is 2l.And original length is l.So it becomes 2.While the correct answer to this statement is 1.