Rút gọn các phân sô sau:
a)\(\frac{2.9+6.7}{8.5+4.2}\)
b)\(\frac{297-15}{1188-60}\)
c)\(\frac{2^5.3^7+2^5.3^2}{2^6.3^{10}}\)
Rút gọn phân số: M=\(\frac{9^4.27^5.3^6.3^4}{3^8.81^4.234.8^2}\)
\(M=\frac{\left(3^2\right)^4.\left(3^3\right)^5.3^6.3^4}{3^8.\left(3^4\right)^4.3^5.\left(2^3\right)^2}=\frac{3^8.3^{15}.3^6.3^4}{3^8.3^{16}.3^5.2^6}=\frac{3^{29}.3^4}{3^{29}.2^6}=\frac{1.81}{1.64}=\frac{81}{64}\)
\(\frac{5^4-5^3}{100}\)
\(\frac{3^3+3^2+3}{39}\)
\(\frac{5.3^7-5.3^5}{5.3^5-5.3^3}\)
\(\frac{2^{15}+2^{14}+2^{13}}{2^{13}+2^{12}+2^{11}}\)
đề bài yêu cầu là rút gọn các bạn nhớ giúp mình nha
5^4-3/100=1/20
3^3+2+1/3*13=3^5/13
5.3^7-5/5.3^5-3=1
2^15+14+13/2^13+12+11=2^6
M = \(\frac{9^4.27^5.3^6.3^4}{3^8.81^4.234.8^2}\)
*Rút gọn nhé
\(M=\frac{9^4.27^5.3^6.3^4}{3^8.81^4.243.8^2}\)
\(M=\frac{\left(3^2\right)^4.\left(3^3\right)^5.3^6.3^4}{3^8.\left(3^4\right)^4.\left(3^5\right).\left(2^3\right)}\)
\(M=\frac{3^8.3^{15}.3^6.3^4}{3^8.3^{16}.3^5.8}\)
\(M=\frac{3^{33}}{3^{29}.8}\)
\(M=\frac{3^4}{1.8}\)
\(M=\frac{81}{8}\)
Chúc bạn học tốt !!!
Sửa hộ mk :
\(8^2=2^9\)
Kết quả : \(\frac{81}{512}\)
Thu gọn
\(B=\frac{2^3-3^4-2^4.3^3}{2^5.3^4-2^6.3^3}\)
\(C=\frac{\frac{1}{2}-\frac{1}{2}:\frac{3}{4}-\frac{3}{4}}{\frac{2}{3}-\frac{2}{3}:\frac{5}{6}-\frac{5}{6}}\)
Rút gọn phân số:\(\frac{7.4^5.3^{11}+2^{13}.9^5}{6^{10}+2^{12}.3^{10}}\)
Rút gọn phân số:\(\frac{7.4^5.3^{11}+2^{13}.9^5}{6^{10}+2^{12}.3^{10}}\)
Rút gọn biểu thức :
1 . \(\frac{3^{10}+6^2}{5.3^8+20}\)
2.\(\frac{28^{15.}3^{17}}{84^{16}}\)
1) \(\frac{3^{10}+6^2}{5\cdot3^8+20}=\frac{3^{10}+3^2\cdot2^2}{5\cdot3^8+5\cdot2^2}=\frac{3^2\left(3^8+2^2\right)}{5\left(3^8+2^2\right)}=\frac{9}{5}\)
2) \(\frac{28^{15}\cdot3^{17}}{84^{16}}=\frac{28^{15}\cdot3^{17}}{28^{16}\cdot3^{16}}=\frac{3}{28}\)
mình cần cách làm nha các bạn , giúp mình với !
rút gọn phân số sau
M = \(\frac{9^4.27^5.3^6.3^4}{3^8.81^4.234.8^2}\)
N = \(\frac{4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}\)
ai nhanh mik tick cho
11/4 giờ = bao nhiêu phút
rút gọn
a) \(\frac{11^4.6-11^5}{11^4-11^5}\)
b ) \(\frac{9^8.3-3^{18}}{9^8.5+9^8.7}\)
c ) \(\frac{10^5-10^5.3}{10^5.11}\)
a.
\(\frac{11^4\times6-11^5}{11^4-11^5}=\frac{11^4\times\left(6-11\right)}{11^4\times\left(1-11\right)}=\frac{-5}{-10}=\frac{1}{2}\)
b.
\(\frac{9^8\times3-3^{18}}{9^8\times5+9^8\times7}=\frac{9^8\times3-\left(3^2\right)^9}{9^8\times\left(5+7\right)}=\frac{9^8\times3-9^9}{9^8\times12}=\frac{9^8\times\left(3-9\right)}{9^8\times12}=-\frac{6}{12}=-\frac{1}{2}\)
c.
\(\frac{10^5-10^5\times3}{10^5\times11}=\frac{10^5\times\left(1-3\right)}{10^5\times11}=-\frac{2}{11}\)
Chúc bạn học tốt