Rút gọn:
\(\frac{2^5.6^{14}.10^7}{2.8^8.3^5.15^7}\)
Rút gọn
A=\(\frac{2.8^4.27^2+4.6^9}{2^2.6^7+2^7.40.9^4}\)
Rút gọn :
A = \(\frac{2.8^4.27^8+4.6^9}{2^7.6^7+2^7.40.9^4}\)
B = \(\frac{4^5.9^4-2.6^9}{2^{10}.3^8+6^8.20}\)
\(A=\frac{2\cdot\left(2^3\right)^4\cdot\left(3^3\right)^8+2^2\cdot\left(2\cdot3\right)^9}{2^7\cdot6^7+2^7\cdot\left(2^3\cdot5\right).\left(3^2\right)^4}\)
\(A=\frac{2\cdot2^{12}\cdot3^{24}+2^2\cdot\left(2\cdot3\right)^9}{12^7+2^7\cdot\left(2^3\cdot5\right)\cdot3^8}\)
Đến đó thì bí
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Cho M=\(\frac{2.8^4.27^2+4.6^9}{2^5.6^7+2^{7\:}.8.9^5}\)Hãy rút gọn M.
Please, giải giúp mình đi !!!!!!!😂
\(M=\frac{2.2^{12}.3^6+2^2.2^9.3^9}{2^5.2^7.3^7+2^7.2^3.3^{10}}\)
\(=\frac{2^{11}.3^6\left(2^2+3^3\right)}{2^{10}.3^7\left(2^2+3^3\right)}\)
\(=\frac{2}{3}\)
\(M=\frac{2.\left(2^3\right)^4.\left(3^3\right)^2+2^2.\left(2.3\right)^9}{2^5.\left(2.3\right)^7+2^7.2^3.\left(3^2\right)^5}\)
\(M=\frac{2.2^{12}.3^6+2^2.2^9.3^9}{2^5.2^7.3^7+2^7.2^3.3^{10}}\)
\(M=\frac{2^{13}.3^6+2^{11}.3^9}{2^{12}.3^7+2^{10}.3^{10}}\)
\(M=\frac{2^{11}.3^6\left(2^2.1+1.3^3\right)}{2^{10}.3^7\left(2^2.1+1.3^3\right)}\)
\(M=\frac{2.31}{3.31}\)
\(M=\frac{2}{3}\)
Study well
\(\frac{7^5.6^8.\left(-3\right)^7}{9^2.7^4.6^9}\)
rút gọn
Ta có :
\(\frac{7^5.6^8.\left(-3\right)^7}{9^2.7^4.6^9}\)\(=\frac{7^4.7.6^8.\left(-1.3\right)^7}{\left(3^2\right)^2.7^4.6^8.6}=\frac{7^4.7.6^8\left(-1\right)^7.3^4.3^3}{3^4.7^4.6^8.6}=\frac{7.\left(-1\right).27}{6}=-\frac{7.27}{6}=-\frac{189}{6}=-\frac{63}{2}\)
Ủng hộ mk nha !!! ^_^
Rút gọn
\(\frac{25^{14}.5^{10}.625^3.125^7}{5^{14}.125^{10}.25^3.625^7}\)
\(\frac{25^{14}.5^{10}.625^3.125^7}{5^{14}.125^{10}.25^3.625^7}=\frac{\left(5^2\right)^{14}.5^{10}.\left(5^4\right)^3.\left(5^3\right)^7}{5^{14}.\left(5^3\right)^{10}.\left(5^2\right)^3.\left(5^4\right)^7}=\frac{5^{28}.5^{10}.5^{12}.5^{21}}{5^{14}.5^{30}.5^6.5^{28}}\)
\(=\frac{5^{71}}{5^{78}}=\frac{1}{5^7}=\frac{1}{78125}\)
RÚT GỌN B=\(\left(\frac{a^2}{a^3-4a}-\frac{10}{5a+10}-\frac{7}{14-7a}\right):\left(a+2-\frac{a^2-6}{a-2}\right)\)
\(A=\frac{2.8^4.27^2+4.6^9}{2^7.6^7+2^7.40.9^4}\)
RÚT GỌN PHÉP TÍNH SAU
Rút gọn:
\(\frac{\frac{5}{7}+\frac{6}{11}+\frac{7}{13}}{\frac{10}{7}+\frac{12}{11}+\frac{14}{13}}\)
Các bạn giúp mình nha!
\(\frac{\frac{5}{7}+\frac{6}{11}+\frac{7}{13}}{\frac{10}{7}+\frac{12}{11}+\frac{14}{13}}\)
\(=\frac{1.\left(\frac{5}{7}+\frac{6}{11}+\frac{7}{13}\right)}{2.\left(\frac{5}{7}+\frac{6}{11}+\frac{7}{13}\right)}\)
\(=\frac{1}{2}\)
Ủng hộ mk nha !!! ^_^
2 tỉnh A và B cách nhau 185,5 km.Lúc 6h một xe máy đi từ A đến B với vận tốc 45km/h. Lúc 6h40` cùng ngày một ô tô đi từ A đến B với vận tốc 55km/h.
a. Hỏi ô tô đuổi kịp xe máy lúc mấy giờ ?
b. Chỗ gặp cách B bao nhiêu km ?
Rút gọn
7.12 - 7 . 9 / 98
32 / 8.11+8.3
\(\frac{7.1^2-7.9}{98}=\frac{7\left(1-9\right)}{98}=\frac{-8}{14}=\frac{-4}{7}\)
\(\frac{3^2}{8.11+8.3}=\frac{9}{8\left(11+3\right)}=\frac{9}{8.14}=\frac{9}{112}\)