Question

Tinh nhanh  (\(2^{78}+2^{79}+2^{80}\)):(\(2^{77}+2^{76}+2^{75}\))

Answer 1

2⁷⁸ ( 1 + 2+ 4) : [ 2⁷⁵ ( 4 + 2 + 1)]

2^{78 :} 2⁷⁵ = 2³ = 8