Câu hỏi của Dương Dương

Question

1.TínhA = 824 . 1215     ------------------        25 . 432B = 155 . 1210    -------------------       68 . 93

Arima Kousei · Accepted Answer

Ta có : $A=\frac{8^{24}.1215}{2^5.432}$$\Rightarrow A=\frac{\left(2^3\right)^{24}.\left(3^5.5\right)}{2^5.\left(2^4.3^3\right)}$$\Rightarrow A=\frac{2^{72}.3^5.5}{2^5.2^4.3^3}$$\Rightarrow A=\frac{2^{72}.3^5.5}{2^9.3^3}$$\Rightarrow A=\frac{2^{63}.3^2.5}{1.1}$$\Rightarrow A=2^{63}.9.5$$\Rightarrow A=2^{63}.45$Vậy $A=2^{63}.45$~ Ủng hộ nhé Câu trả lời: Ta có : $A=\frac{8^{24}.1215}{2^5.432}$$\Rightarrow A=\frac{\left(2^3\right)^{24}.\left(3^5.5\right)}{2^5.\left(2^4.3^3\right)}$$\Rightarrow A=\frac{2^{72}.3^5.5}{2^5.2^4.3^3}$$\Rightarrow A=\frac{2^{72}.3^5.5}{2^9.3^3}$$\Rightarrow A=\frac{2^{63}.3^2.5}{1.1}$$\Rightarrow A=2^{63}.9.5$$\Rightarrow A=2^{63}.45$Vậy $A=2^{63}.45$~ Ủng hộ nhé

Arima Kousei · Answer

Ta có : $B=\frac{15^5.12^{10}}{6^8.9^3}$$\Rightarrow B=\frac{\left(3.5\right)^5.\left(2^2.3\right)^{10}}{\left(2.3\right)^8.\left(3^2\right)^3}$$\Rightarrow B=\frac{3^5.5^5.\left(2^2\right)^{10}.3^{10}}{2^8.3^8.3^6}$$\Rightarrow B=\frac{3^{15}.5^5.2^{20}}{2^8.3^{14}}$$\Rightarrow B=\frac{3.3125.2^{12}}{1.1}$$\Rightarrow B=3.3125.4096$$\Rightarrow B=38400000$Vậy $B=38400000$Câu trả lời: Ta có : $B=\frac{15^5.12^{10}}{6^8.9^3}$$\Rightarrow B=\frac{\left(3.5\right)^5.\left(2^2.3\right)^{10}}{\left(2.3\right)^8.\left(3^2\right)^3}$$\Rightarrow B=\frac{3^5.5^5.\left(2^2\right)^{10}.3^{10}}{2^8.3^8.3^6}$$\Rightarrow B=\frac{3^{15}.5^5.2^{20}}{2^8.3^{14}}$$\Rightarrow B=\frac{3.3125.2^{12}}{1.1}$$\Rightarrow B=3.3125.4096$$\Rightarrow B=38400000$Vậy $B=38400000$

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