A= (5 x 4 mũ 15 x 9 mũ 9- 4 x 3 mũ 20 x 8 mũ 9 )/ 5 x 2 mũ 19 x 6 mũ 20 - 7 x 2 mũ 29 x 27 mũ 6
1 câu trả lời
Đáp án + Giải thích các bước giải:
`A=(5.4^15 .9^9 -4.3^20 .8^9)/(5.2^19 .6^20 -7.2^29 .27^6)`
`=>A=(5.(2^2)^15 .(3^2)^9 -2^2 .3^20 .(2^3)^9)/(5.2^19 .(2.3)^20 -7.2^29 .(3^3)^6)`
`=>A=(5.2^30 .3^18 -2^2 .3^20 .2^27)/(5.2^19 .2^20 .3^20 -7.2^29 .3^18)`
`=>A=(5.2^30 .3^18 -2^29 .3^20)/(5.2^39 .3^20 -7.2^29 .3^18)`
`=>A=(2^29 .3^18(5.2-3^2))/(2^29 .3^18(5.2^10 .3^2 -7))`
`=>A=(10-9)/(5.1024.9-7)`
`=>A=1/(5120.9-7)`
`=>A=1/(46080-7)`
`=>A=1/(46073)`
Vậy `A=1/(46073)`
