 Hi and welcome to the session. I am Neha and I am going to help you with the following question. The question says find the value of 1 upon 2 to the power minus 2 plus 1 upon 3 to the power minus 2 plus 1 upon 4 to the power minus 2. Let's see its solution. We need to find the value of 1 upon 2 to the power minus 2 plus 1 upon 3 to the power minus 2 plus 1 upon 4 to the power minus 2. Now we know that a to the power minus m is equal to 1 upon a to the power m and this can also be written as 1 upon a to the power. So here to find a to the power minus m we have taken the reciprocal of a that is 1 upon a to the power m. So this will be equal to now here it's 1 upon 2 to the power minus 2. So to get the positive exponent we will take the reciprocal of the base that is 2 upon 1 to the power 2 plus again we will do the same thing reciprocal of 1 upon 3 is 3 upon 1 to the power 2 equal to that is is equal to therefore 29 is a required answer for this question and with this we finish this session. Hope you must have enjoyed it.