 and welcome to the session. Today we will discuss the following question. The question says evaluate 1 upon 3 to the power minus 1 minus 1 upon 4 to the power minus 1 whole to the power minus 1. Let's see its solution. We need to solve the expression 1 upon 3 to the power minus 1 minus 1 upon 4 to the power minus 1 whole to the power minus 1. Now we know that for any non-zero integer a, a to the power minus m is equal to 1 upon a to the power m. Now this can also be written as 1 upon a to the power m. So here we have taken the reciprocal of the base a that is 1 upon a. So this can be written as here to get the positive exponent we will take the reciprocal of 1 upon 3 and the reciprocal of 1 upon 3 is 3 upon 1. So it will be 3 upon 1 to the power 1 minus same way it will be 4 upon 1 to the power 1 whole to the power minus 1. This is equal to 3 minus 4 to the power minus 1 that is minus 1 to the power minus 1. Now again using the result a to the power minus m is equal to 1 upon a to the power m we get 1 upon minus 1 to the power 1 that is equal to minus 1. Therefore minus 1 is the final answer for this question. With this we finish this session hope you must have enjoyed it. Goodbye and take care.