If the probability mass function is P(X=k)=c⋅3−kP(X=k) = c \cdot 3^{-k}P(X=k)=c⋅3−k for k=1,2,3,…k = 1, 2, 3, \dotsk=1,2,3,…, what is the constant ccc?
1
2
1/2
3