a, B=\(\dfrac{2^{10}.13+2^{10}.65}{2^8.104}\) b, C=\(\dfrac{4^9.36+64^9}{16^4.100}\)
c, D=\(\dfrac{72^3.54^2}{108^4}\) d, E=\(\dfrac{4^6.3^4.9^5}{6^{12}}\)
Tính :
a) \(\left(\dfrac{3}{7}+\dfrac{1}{2}\right)^2\)
b) \(\left(\dfrac{3}{4}-\dfrac{5}{6}\right)^2\)
c) \(\dfrac{5^4.20^4}{25^5.4^5}\)
d) \(\left(\dfrac{-10}{3}\right)^5.\left(\dfrac{-6}{5}\right)^4\)
tính a) \(\left(3,5\right)^3\) ; b) \((-\dfrac{4}{11})^2\) ; c) (0,5)\(^4\).6.\(^4\) ; d) (\(\dfrac{-1}{3})^5\):\(\left(\dfrac{1}{6}\right)^5\)
Tính
\(a.\left(\dfrac{3}{7}+\dfrac{1}{2}\right)^2;b.\left(\dfrac{3}{4}-\dfrac{5}{6}\right)^2;c.\dfrac{5^4.20^4}{25^5.4^5};c.\left(\dfrac{-10}{3}\right)^5.\left(\dfrac{-6}{5}\right)^4\)
Bài 1, tính:
a (\(\dfrac{2^3}{3}\))
b (\(-2\dfrac{3^2}{4}\))
c (0,6)\(^4\)
d (\(\dfrac{-1^4}{2}\))
e (\(\dfrac{-1^5}{2}\))
Bài 2 Viết mỗi số \(\dfrac{81}{125}\) ; \(\dfrac{-8}{27}\) dưới dạng một lũy thừa
So sánh 2 biểu thức A và B
a, A=\(\dfrac{10^{15}+1}{10^6+1}\) và B= \(\dfrac{10^6+1}{10^{17}+1}\)
b, C=\(\dfrac{2^{2008}-3}{2^{2007}-1}\) và D=\(\dfrac{2^{2007}+3}{2^{2006}-1}\)
c, M=\(\dfrac{3}{8^3}+\dfrac{7}{8^4}\) và N=\(\dfrac{7}{8^3}+\dfrac{3}{8^4}\)
d, E=\(\dfrac{23^{2000}+3}{23^{2001}+40}\) và F=\(\dfrac{23^{2001}+3}{23^{2002}+40}\)
B1 Tính :
a, ( \(\dfrac{-1}{3}\))2 . ( \(\dfrac{-1}{3}\))
b, ( \(\dfrac{1}{7}\))7 . 77 ( 7 mũ 7 nha )
c, 8/4 ( 8 mũ 4 , 4 mũ 4 )
d, 90/15 ( 90 mũ 3 , 15 mũ 3 )
e, 2.3+2.3/10 ( 3 mũ 3, cả 2 số 3 đó ) còn 2 bên phải là mũ 3
tim x
a, \(\left(3x-2\right)^2=16\)
b, \(\left(\dfrac{4}{5}x-\dfrac{3}{4}\right)^3=\dfrac{-8}{125}\)
c, \(5^{x+2}+5^x=3250\)
d, \(\left(4x-3\right)^4=\left(4x-3\right)^2\)
giup minh nhe minh dang can gap
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) \(7.2^x=2^9+5.2^8\)