(1×2×4+2×4×8+3×6×12+……+6×12×24)÷(1×3×9+2×6×18+3×9×27+……+6×18×54)=?

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/29 05:39:43
(1×2×4+2×4×8+3×6×12+……+6×12×24)÷(1×3×9+2×6×18+3×9×27+……+6×18×54)=?

(1×2×4+2×4×8+3×6×12+……+6×12×24)÷(1×3×9+2×6×18+3×9×27+……+6×18×54)=?
(1×2×4+2×4×8+3×6×12+……+6×12×24)÷(1×3×9+2×6×18+3×9×27+……+6×18×54)=?

(1×2×4+2×4×8+3×6×12+……+6×12×24)÷(1×3×9+2×6×18+3×9×27+……+6×18×54)=?
8/27

8/27
思路:(1×2×4+2×4×8+3×6×12+……+6×12×24)÷(1×3×9+2×6×18+3×9×27+……+6×18×54)
=2×4×(1+2×4+3×9+4×16+……+6X36)÷
3X9X(1+2×4+3×9+4×16+……+6X36)
=8/27