A1/4
B1/2
C1/3
D1/5
Answer:
Related Questions:
15+152+153+154=?\frac15+\frac1{5^2}+\frac1{5^3}+\frac1{5^4}=?51+521+531+541=?
0.64×0.36=?\sqrt{0.64\times0.36}=?0.64×0.36=?
