 Hello and welcome to the session. In this session we discuss the final question which says, find the value of log 128 to the base 8. We know that log of the number n to the base a is equal to x means that a to the power x is equal to n. This is the key idea that we use for this question. Let's proceed with the solution now. We suppose let log of 128 to the base 8 be equal to x. The key idea we have that this means x is equal to 128. Now we can write 8 as 2 raised to the power 3 and this whole to the power x is equal to 128. Now we factorize 128 and factorizing 128 we get 128 is equal to 2 to the power of 7. So we can write here 2 to the power of 7. This means 2 to the power 3x is equal to 2 to the power 7. Which means that 3x is equal to 7 and so we get x equal to 7 upon 3. And we had assumed x to be log of 128 to the base 8. Therefore we have log of 128 to the base 8 is equal to 7 upon 3. This is our final answer. Hope you have understood the solution of this question.