Evaluate the following limits:

As we need to find


We can directly find the limiting value of a function by putting the value of the variable at which the limiting value is asked if it does not take any indeterminate form (0/0 or ∞/∞ or ∞-∞, .. etc.)


Let Z =


we need to take steps to remove this form so that we can get a finite value.


TIP: Most of the problems of logarithmic and exponential limits are solved using the formula and


This question is a direct application of limits formula of exponential and logarithmic limits.


As Z =


Z =


{Adding and subtracting 1 in numerator}


Z =


{using algebra of limits}


To get the form as present in the formula we multiply and divide 3 and 2 into both terms respectively:


Z =


Use the formula:


Z = 3log e – 2log e= 3-2 = 1


{using log e = 1}


Hence,



35