What is the formula for series of cube of natural number?
Answers
Answered by
3
It seems that the sum is always square, but what is even more remarkable is that the sum of the first n cubes, 13+23+...+ n 3 = ( n ( n +1)/2)2, which is the square of the n th triangle number. For example, 13+23+...+103=(10×11/2)2=552 = 3025.
Similar questions