Ghi lời giải đầy đủ nhé cảm ơn ạ
Tính nhanh :
a, A= 1 + 4 + 16 + 64 + .........+ 16384 + 65536
b, B= 1/2 + 1/4 + 1/8 + 1/16 + ..........+ 1/128 + 1/256
c, C= 4/1x5 + 4/5x9 + 4/8x13 +...........+ 4/81/85 + 4/81x89
d, D= 1/1x4 + 1/4x7 + 1/7x10 + ..........+ 1/301x304 + 1/304x307
e, E= 1/2 + 1/6 + 1/12 + 1/20 + 1/30 +........+ 1/110 + 1/132
g, G= 2/1x6 + 2/6x11 + 2/11x16 + 2/16x21+........+ 2/91x96 + 2/96x101