Tính
A= 20.4^14.9^9-4.9^10.8^9/40.2^6.6^19-7.2^29.27^6
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các bạn giải nhanh hộ mình đc ko Tính:
A)5.4^15.9^9-4.9^10.8^9/6^19.4^5.5-7.2^29.27^6
B)2^10.4^5-9^2.4^6/3^5.8^4+2^6.6^6 - 25^5.7^3-49^2.25^3.625/14^3.5^9+(125.7)^3
q
so sánh A=5.4^15.9^9-4.3^10.8^9 với B=5.2^9.6^19-7.2^29.27^6
5.4^15.9^9-4.3^20.8^9/5.2^10.6^19-7.2^29.27^6
5.4^15 9^9 - 4. 3^20.8^9
5.2^9.6^19-7.2^29.27^6
B = 5.415.99 - 4.320.89
B = 5.(22)15.(32)9- (22).320.(23)9
B = 5.230.318 - 229.320
B = 229.318( 5.2 - 9)
B = 229.318.(10-9)
B = 229.318
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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
\(\frac{5.4^{15}.9^9-4.3^{20}.8^9}{5.2^9.6^{19}-7.2^{29}.27^6}=\frac{5.2^{30}.3^{18}-2^2.2^{27}.3^{20}}{5.2^9.2^{19}.3^{19}-7.2^{29}.3^{18}}\)
\(=\frac{2^{29}.3^{18}\left(5.2-3^2\right)}{2^{28}.3^{18}.\left(5.3-7.2\right)}=\frac{2.1}{1}=2\)
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C = 5.4^15.9^9-4.3^20.8^9 / 5.2^9.6^19-7.2^29.27^6
Tính 5.4^15.9^9-4.3^20.8^9/5.2^9.6^19-7.2^29.27^6
=\(\frac{5\cdot2^{30}\cdot3^{18}-2^2\cdot3^{20}\cdot2^{27}}{5\cdot2^9\cdot\left(2\cdot3\right)^{19}-7\cdot2^{29}\cdot3^{18}}\)=\(\frac{5\cdot2^{30}\cdot3^{18}-3^{20}\cdot2^{29}}{5\cdot2^{28}\cdot3^{19}-7\cdot2^{29}\cdot3^{18}}\)=\(\frac{2^{29}\cdot3^{18}\cdot\left(5\cdot2-3^2\right)}{2^{28}\cdot3^{18}\left(5\cdot3-7\cdot2\right)}\)=2
Thực hiện phép tính: 5.4^15-9^9-4.3^20.8^9/5.2^9.6^19-7.2^29.27^6