\(2x=5.9^2:8\)
\(2x=5.81:8\)
\(16x=405\)
\(x=\dfrac{405}{16}\)
\(5\cdot9^2:8=2x\\\Rightarrow 2x=5\cdot81:8\\\Rightarrow2x=405:8\\\Rightarrow2x=\dfrac{405}{8}\\\Rightarrow x=\dfrac{405}{16}\\Vậy:x=\dfrac{405}{16}\)
\(2x=5.9^2:8\)
\(2x=5.81:8\)
\(16x=405\)
\(x=\dfrac{405}{16}\)
\(5\cdot9^2:8=2x\\\Rightarrow 2x=5\cdot81:8\\\Rightarrow2x=405:8\\\Rightarrow2x=\dfrac{405}{8}\\\Rightarrow x=\dfrac{405}{16}\\Vậy:x=\dfrac{405}{16}\)
Tính:
a) \(\dfrac{4^5.9^4-2.6^9}{2^{10}.3^8+6^8.20}\)
b) T=\(\dfrac{5^{16}.27^7}{125^5.9^{11}}\)
4^5.9^4-2.6^9/2^10.3^8+6^10
\(\dfrac{4^5.9^4-2.6^9}{2^{10}.3^8+6^8.20}\)
4\(\frac{1}{2}\)-\(\frac{15}{10.9}-\frac{15}{9.8}-...-\frac{15}{3.2}-\frac{15}{2.1}\)
\(\frac{6}{2.5}+\frac{8}{5.9}+\frac{12}{9.15}\)
\(1-\frac{2}{2.1}-\frac{6}{2.5}-\frac{8}{5.9}-\frac{8}{9.13}\)
1/ Rút gọn
\(A=\frac{4^5.9^4-2.6^9}{2^{10}.3^8-6^8.20}\)
\(B=\frac{2^{19}.27^3+15.4^9.9^4}{6^9.2^{10}+12^{10}}\)
2/ Tìm x
\(\frac{7^{x+2}+7^{x+1}+7^x}{57}=\frac{5^{2x}+5^{2x+1}+5^{2x+3}}{131}\)
Tính: A=\(\dfrac{4^5.9^4-2.6^9}{2^{10}.3^8+6^8.20}\)
Rút gọn : A = 4^5.9^4-2.6^9\2^10.3^8+6^8.20
rút gọn P=14^5.9^4-6^9.49^2/2^10.49^3.3^8+6^8.7^5.13
\(^{\frac{4^5.9^4-2.6^9}{2^{10}.3^8+6^8.20}}\)