\(\frac{5^4+2^2.5^2-125}{2^3.3}\)=?
Tính giá trị của các biểu thức sau
\(\frac{5^4+2^2.5^2-125}{2^3.3}\)
Ta có : \(\frac{5^4+2^2.5^2-125}{2^2.3}=\frac{5^4+5^2.2^2-5^3}{8.3}=\frac{5^2\left(5^2+2^2-5\right)}{24}=\frac{5^2.24}{24}=5^2=25\)
Tính giá trị biểu thức:
\(\frac{6^2.27^5}{4^5.81^6}\)
\(\frac{3^{18}.32^9}{64^7.27^6}\)
\(\frac{9^{12}.3^5+9^{15}}{\left(2.27\right)^5.3^{14}}\)
\(\frac{5^4+2^2.5^2-125}{2^3.3}\)
hinh nhu bn dag loi dung online math
TYính giá trị các biểu thức sau
a,A=5^4+2^2.5^2-125 phần 2^3.3
B,b=9^9.32^9 phần 64^7.27^6
c,C=15.27^7.3^8-9^15 phần (2.9^8)^2
rút gọn: \(\frac{2^3.3^4}{2^2.3^2.5}\)
Ta có:
\(\frac{2^2.2.3^2.3^2}{2^2.3^2.5}\) =\(\frac{2.3^2}{5}\) =\(\frac{18}{5}\)
Vậy
Ta cã: \(\frac{2^3.3^4}{2^2.3^2.5}\)
\(=\frac{2^2.2.3^2.3^2}{2^2.3^2.5}\)
\(=\frac{2.3^2}{5}\)
\(=\frac{18}{5}\)
rút gọn ps
\(\frac{2^3.3^4}{2^2.3^2.5}\)
\(\frac{2^3.3^4}{2^2.3^2.5}=\frac{2^2.3^2.2.3^2}{2^2.3^2.5}=\frac{2^2.3^2.18}{2^2.3^2.5}=\frac{18}{5}\)
THỰC HIỆN PHÉP TÍNH:
\(\frac{\left(2^3.3^3\right)^2.5^5}{\left(2^2\right)^3.\left(3^2.5^2\right)^2}\)
Tìm x, biết:
\(\frac{10^{10}+10^{11}+10^{12}}{13^2+14^2\left(2.3x^{-5}-2^3.3^2\right)}=2.5^2.5\)
Tính \(A=-\frac{19}{2^3.3^2.5}+\left(-3\frac{1}{2}\right)^2:1,2-\left(-1\frac{1}{3}\right)^3:\frac{5}{6}\)
Tính và Quy Đồng : \(\frac{4^2.5.11}{44.20};\frac{13.15.6}{18.65.7};\frac{7.2.8.5^2}{14.2.5}va\frac{2^3.3^2.5}{3.2^3.5^3}\)
\(\frac{4^2.5.11}{44.20}=\frac{2^4.5.11}{2^2.11.2^2.5}=\frac{2^4.5.11}{2^4.5.11}=1\)
\(\frac{13.15.6}{18.65.7}=\frac{13.3.5.2.3}{2.3^2.13.5.7}=\frac{3^2.2.5.13}{2.3^2.13.5.7}=\frac{1}{7}\)
\(\frac{4^2.5.11}{44.20};\frac{13.15.6}{18.65.7};\frac{7.2.8.5^2}{14.2.5}\)và\(\frac{2^3.3^2.5}{3.2^3.5^3}\)
Ta có : \(\frac{4^2.5.11}{44.20}=\frac{42.5.11}{4.11.4.5}=\frac{4^2.1.1}{4^2.1.1}=1\)
\(\frac{13.15.6}{18.65.7}=\frac{13.3.5.6}{3.6.15.5.7}=\frac{1.1.1.1}{1.1.1.1.7}=\frac{1}{7}\)
\(\frac{7.2.8.5}{14.2.5}=\frac{7.2.2^3.5^2}{2.7.2.5}=\frac{1.1.2^2.5}{1.1.1.1}=\frac{20}{1}\)
\(\frac{2^3.3^3.5}{3.2^3.5^3}=\frac{1.3^2.1}{1.1.5^2}=\frac{9}{25}\)
+) Ta có : \(7=7\)
\(25=5^2\)
\(MC=BCNN\left(7;25\right)=5^2.7=175\)
Khi đó : ................
p/s : kham khảo