 Hello and welcome to the session. The question says, find the derivative of the following functions. It is to be understood that A, B, C, D, E, Q, R and S affects non-zero constants and M and N are integers. So here we have to find the derivative of X plus A. So let's start with the solution and let us denote the given function by fx. Its first derivative is denoted by f dash x or ddx of the function x plus A. It is further written as ddx of x plus ddx of A. This is further equal to ddx of x is derivative of x with respect to x is 1 plus derivative of constant with respect to x is 0. Therefore our answer is 1. Thus derivative of the given function x plus A is equal to 1. So this completes the session. Bye and take care.