The equation doesn't make any sense if x and n can be any real numbers. Shouldn't at least n be restricted to non-negative integers? And if you intend the LHS to be xPn, that would normally require both x and n to be non-negative integers (and therefore C also).Calculate x and n, C can be any real numbers in below equation
x∙(x−1)∙(x−2)….…..(x−n)=C