\(A=\dfrac{2^{13}.9^5}{6^8.8^3}=\dfrac{2^{13}.3^{10}}{3^8.2^8.2^9}=\dfrac{2^{13}.3^{10}}{3^8.2^{17}}=\dfrac{3^2}{2^4}=\dfrac{9}{16}\)
\(A=\dfrac{2^{13}.9^5}{6^8.8^3}=\dfrac{2^{13}.3^{10}}{3^8.2^8.2^9}=\dfrac{2^{13}.3^{10}}{3^8.2^{17}}=\dfrac{3^2}{2^4}=\dfrac{9}{16}\)
BÀI 2 TÍNH :
A = \(\dfrac{6^3+3.6^2+3^3}{13}\)
B = \(\dfrac{4^6.9^5+6^9.120}{8^4-3^{12}.6^{11}}\)
Câu 2: Tính
C = \(\dfrac{6^3+3.6^2+3^3}{13}\)
D = \(\dfrac{4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}\)
1/Tính
a)
\(\frac{2}{5}+\frac{1}{5}\times\left(\frac{3}{4}\right)\)
b)\(\frac{5}{12}\times\left(\frac{-3}{4}\right)+\frac{7}{12}\times\left(\frac{-3}{4}\right)\)
c)\(\frac{2^{15}\times9^4}{6^6\times8^3}\)
2/Tìm x biết:
a)\(\frac{5}{7}+\frac{2}{7}x=1\)
b)0,2+\(\left|x-1,3=1,5\right|\)
c)\(2^x+5=37\)
d)\(2^x+2^{x+1}=48\)
a) \(\dfrac{5^5}{5^x}=5^{18}\)
b) \(\dfrac{2^{4-x}}{16^5}=32^6\)
c) \(\dfrac{2^{2x-3}}{4^{10}}=8^3.16^5\)
d) \(\dfrac{2^3}{2^x}=4^5\)
e) \(9.5^x=6.5^6+3.5^6\)
f) \(7.2^x=2^9+5.2^8\)
x:[ \(\dfrac{8}{5}\) . (\(\dfrac{2}{3}\))\(^2\) - \(\dfrac{2}{5}\) ] = \(\dfrac{15}{7}+\dfrac{6}{5}\) [(2\(\dfrac{1}{7}\))\(^2\) - \(\dfrac{50}{49}\) ]
tìm x
giúp mk nhó
Tìm giá trị của các biểu thức sau :
a) \(\dfrac{4^2.4^3}{2^{10}}\)
b) \(\dfrac{\left(0,6\right)^5}{\left(0,2\right)^6}\)
c) \(\dfrac{2^7.9^3}{6^5.8^2}\)
d) \(\dfrac{6^3+3.6^2+3^3}{-13}\)
Rút gọn:
a, A=\(\dfrac{2^6.9^2}{6^4.8}\)
b, B=\(\dfrac{2^{13}.3^7}{2^{15}.3^2.9^2}\)
Trong vở bài tập của bạn Dũng có bài làm sau :
a) \(\left(-5\right)^2.\left(-5\right)^3=\left(-5\right)^6\)
b) \(\left(0,75\right)^3:0,75=\left(0,75\right)^2\)
c) \(\left(0,2\right)^{10}:\left(0,2\right)^5=\left(0,2\right)^2\)
d) \(\left[\left(-\dfrac{1}{7}\right)^2\right]^4=\left(-\dfrac{1}{7}\right)^6\)
e) \(\dfrac{50^3}{125}=\dfrac{50^3}{5^3}=\left(\dfrac{50}{5}\right)^3=10^3=1000\)
Hãy kiểm tra lại các đáp số và sửa lại chỗ sai (nếu có)
f) \(\dfrac{8^{10}}{4^8}=\left(\dfrac{8}{4}\right)^{10-8}=2^2\)
Tính
\(\dfrac{\left(0,6\right)^5}{\left(0,2\right)^6}\)
\(\dfrac{2^7.9^3}{6^5.8^2}\)
\(\dfrac{6^3+3.6^2+3^3}{-13}\)
Mọi người giúp mk nhé.Mk đag cần gấp.Dấu . là nhân nhà