Cho A = 5. 4^15 . 9^9- 4.3^20.8^9
B = 5 . 2^9 . 6^19 - 7. 2^29.27^6
a, (7.6^10.2^20.3^6-2^19.6^15) : (9.6^19.2^9-4.3^17.2^20)
b, (5.4^15.9^9-4.3^20.8^9) : (5.2^9.6^19-7.2^29.27^6)
5.4^15-9^9-4.3^20.8^9/5.2^9.6^19-7.2^29.27^6
Thực hiện phép tính: 5.4^15-9^9-4.3^20.8^9/5.2^9.6^19-7.2^29.27^6
Thực hiện phép tính: 5.4^15-9^9-4.3^20.8^9/5.2^9.6^19-7.2^29.27^6
đề bài \(\frac{5\cdot4^{15}\cdot\left(-9\right)^9-4\cdot3^{20}\cdot8^9}{5.2^9.6^{19}-7.2^{29}.27^6}\)
Giải:
\(\frac{5\cdot4^{15}\cdot\left(-9\right)^9-4\cdot3^{20}\cdot8^9}{5.2^9.6^{19}-7.2^{29}.27^6}\)=\(\frac{5.\left(2^2\right)^{15}.\left(-3^2\right)^9-2^2.3^{20}.\left(2^3\right)^9}{5.2^9.\left(2.3\right)^{19}-7.2^{29}.\left(3^3\right)^6}=\frac{-5.2^{30}.3^{18}-2^2.3^{20}.2^{27}}{5.2^9.2^{19}.3^{19}-7.2^{29}.3^{18}}\)
=\(\frac{-5.2^{30}.3^{18}-2^{29}.3^{20}}{5.2^{28}.3^{19}-7.2^{29}.3^{18}}\)
=\(\frac{-2^{29}.3^{18}.\left(5.2+3^2\right)}{2^{28}.3^{18}.\left(5.3-7.2\right)}\)
=\(\frac{-2^{29}.3^{18}.19}{2^{28}.3^{18}.1}\)
=\(=-2.19=-38\)
5.4^15.9^9-4.3^20.8^9/5.2^10.6^19-7.2^29.27^6
A=5.4^15.9^9-4.3^20.8^9 và B=5.2^9.6^19-7.2^29.27^6.
Tim A,B
Viết lại rõ ràng đi khó hiểu quá
nek cậu:
A=5.415.99-4.320.89và B=5.29.619-7.229.276
Tính A,B
5.4^15.9^9-4.3^20.8^9/5.2^9.6^19-7.2^29.27^6
\(\frac{5.4^{15}.9^9-4.3^{20}.8^9}{5.2^9.6^{19}-7.2^{29}.27^6}=\frac{5.2^{30}.3^{18}-2^2.2^{27}.3^{20}}{5.2^9.2^{19}.3^{19}-7.2^{29}.3^{18}}\)
\(=\frac{2^{29}.3^{18}\left(5.2-3^2\right)}{2^{28}.3^{18}.\left(5.3-7.2\right)}=\frac{2.1}{1}=2\)
A=5.4^15.9^9-4.3^20.8^9
B=5.2^9.6^19-7.2^29.27^6
Tính A:B
C = 5.4^15.9^9-4.3^20.8^9 / 5.2^9.6^19-7.2^29.27^6