What's the cube of 1 + 2 + 10? What's the cube of 1-10?

What's the cube of 1 + 2 + 10? What's the cube of 1-10?

Cube of 1 + cube of 2. + cube of 10
=(1+2+3+…… +10) Square of
=55 square
=3025

There is a three digit number. If you add the number 5 in front of it, you can get a four digit number. The difference between the four digits is 2889. Find the original three digits

234 procedure: let this number be ABC
Then 5abc-abc5 = 2889
If C is 9 + 5 = 14, C is 4
And so on: 5ab4 - ab45 = 2889, B is 3
If 5a34 - A345 = 2889, a is 2
So the number is 234

X power of 2 / (x power of 1 + 2 + x power of 4) DX

Original formula = 2 ^ X / 2 ^ x (2 + 1 + 1 / 2 ^ x) = 1 / (3 + 1 / 2 ^ x)