S = 1 + 2 ^ - 1 + 2 ^ - 2 + 2 ^ - 3 + +2 ^ - 2010, please calculate the formula on the right to get the value of S, (hint: multiply by 2 on both sides of the equation) do you see the law?

S = 1 + 2 ^ - 1 + 2 ^ - 2 + 2 ^ - 3 + +2 ^ - 2010, please calculate the formula on the right to get the value of S, (hint: multiply by 2 on both sides of the equation) do you see the law?

S=1+2^-1+2^-2+2^-3+…… +2 ^ - 2010 (multiply both sides by 2)
2S=2+1+2^-1+2^-2+2^-3+…… +2^-2009
2S=2+1+2^-1+2^-2+2^-3+…… +2^-2009+2^(-2010)-2^(-2010)
2S=2+S-2^(-2010)
S=2-2^(-2010)