Functions can also take multiple inputs; for instance, a function f(x,y) maps two input numbers, x and y , and outputs a number. In general, the inputs are allowed to vary independently of one an...Functions can also take multiple inputs; for instance, a function f(x,y) maps two input numbers, x and y , and outputs a number. In general, the inputs are allowed to vary independently of one another. The partial derivative of such a function is its derivative with respect to one of its inputs, keeping the others fixed.
