The correct answer is:

In this question we have to find the value of 
Step1: Using the formula of sum of numbers.


Step2: Putting the value of sum in the given expression.
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In first part of the expression the highest exponent of  in denominator is . and limit is  then any term in the numerator with exponent less than  will go to . While in second part of the expression the highest exponent in the denominator . So, any terms of  in numerator with exponent less than  will go to 
In first part of the expression the coefficient of highest exponent of  is .
=>So, the limit will be