Let
P = 1/7 + 1/7^2 + 1/7^3 + ...
Then P can be expressed in the form a/b, where a and b are positive integers. Find the smallest possible value of a + b?
∑]1 / 7^n, n, 1, ∞]==It converges to 1/6
a/b ==1 / 6
a + b ==1 + 6 ==7
