for loop can be simplifed to x= (pow(3,n)-1)/2 I have double checked this here:http://www.wolframalpha.com/input/?i=sum+pow%283%2Ci%29+for+i+from+0+to+%28n-1%29 3 solved Convert loop into mathematical equation
p has to be initialized to 1 as 0 * X == 0 Also i and j (why not k) have to be initialized to 1 as it is required by your formula You have to sum up the products after the products where calculated as you would add 1 to the correct result otherwise … Read more
Note that if r is a primitive root modulo p. Then we can reduce complexity of the sum. We have to find S = a1*1 + a1*r + a1*r^2 + … + a1*r^n. Then we write S in the closed form as S = a1*(r^n – 1) / (r – 1). Now it can be … Read more
Have you taken algebra? PrValue = (Pa * (1-Math.pow(1+IntRate, – (Period*PPay))))/IntRate 1 solved Reversing a math formula [closed]