Mk có cách giải khác nè
1/4+1/8+1/16+1/32+1/64+1/128
= 1/2-1/4+1/4-1/8+1/8-1/16+1/16-1/32+1/32-1/64+1/64-1/128
= 1/2-1/128
= 63/128
=\(\frac{32}{128}\)+\(\frac{16}{128}\)+\(\frac{8}{128}\)+\(\frac{4}{128}\)+\(\frac{1}{128}\)=\(\frac{32+16+8+4+1}{128}\)=\(\frac{61}{128}\)
1/4+1/8+1/16+1/32+1/64+1/128
= 32/128+16/128+8/128+4/128+2/128+1/128
=32+16+8+4+2+1/128
= 63/128
có ai có cách làm khác ko
Nếu ko thì............