Ta có:
\(\dfrac{2^5.15^3}{6^3.10^2}=\dfrac{2^5.3^3.5^3}{2^3.3^3.2^2.5^2}=\dfrac{8.1.5}{8.1.1.1}=\dfrac{40}{8}=5\)
Ta có:
\(\dfrac{2^5.15^3}{6^3.10^2}=\dfrac{2^5.3^3.5^3}{2^3.3^3.2^2.5^2}=\dfrac{8.1.5}{8.1.1.1}=\dfrac{40}{8}=5\)
1) tính
\(\dfrac{2^5.15^3}{6^3.10^2}\)
1) thực hiện phép tính
a)\(\dfrac{2^4.2^6}{\left(2^5\right)^2}.2008\)
b)\(\dfrac{2^5.15^3}{6^3.10^2}\)
Tính x, y
\(3x=y\); \(5y=4z\) và \(6x+7y+8z=456\)
\(\dfrac{x}{3}=\dfrac{y}{5}=\dfrac{z}{7}\) và \(2x+3y-z=-14\)
Thực hiện phép tính:
\(\dfrac{2^4.2^6}{\left(2^5\right)^2}\)-\(\dfrac{2^5.15^3}{6^3.10^2}\)
Tính bằng cách hợp lí : \(\dfrac{15^3+5.15^2-5^3}{18^3+6.18^2-6^3}\)
Tìm số nguyên x, nếu biết
a, \((\dfrac{1}{2}-\dfrac {1}{6})3^x +3^{x+2}= 3^{16}+3^{13}\)
b, \((\dfrac {1}{2}-\dfrac{1}{3}).6^x +6^{x+2}= 6^{15}+6^{18}\)
c, \((\dfrac{1}{3}+\dfrac{1}{6})2^{x+3} -2^x = 2^{22}-2^{20}\)
Tìm số nguyên x ,nếu biết
a, \((\dfrac {1}{2}-\dfrac {1}{6}).3^x+3^{x+1}= 3^{16}+3^{13}\)
b, \((\dfrac {1}{2}-\dfrac {1}{3}).6^{x+2}-6^x = 6^{14}-6^{13}\)
c, \((\dfrac {1}{3}+\dfrac {1}{6}).2^{x+4}-2^x=2^{13}-2^{10}\)
d, \((\dfrac {1}{2}-\dfrac {1}{6}.3^{x+4} - 4.3^x =3^{16}-4.3^{13}\)
a,\(-4\dfrac{1}{3}.\left(\dfrac{1}{2}-\dfrac{1}{6}\right)< hoac=x< hoac=\dfrac{-2}{5}.\left(\dfrac{1}{3}-\dfrac{1}{2}-\dfrac{3}{4}\right)\)
b, \(-4\dfrac{2}{5}.2\dfrac{4}{3}< hoac=x< hoac=-2\dfrac{3}{5}:1\dfrac{6}{15}\)
Tìm số nguyên x biết: a) \(-4\dfrac{3}{5}.2\dfrac{4}{23}\le x\le-2\dfrac{3}{5}:1\dfrac{6}{15}\)
b)\(-4\dfrac{1}{3}.\left(\dfrac{1}{2}-\dfrac{1}{6}\right)\le x\le-\dfrac{2}{3}\left(\dfrac{1}{3}-\dfrac{1}{2}-\dfrac{3}{4}\right)\)
\(tính:\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{4}-\dfrac{1}{5}+\dfrac{1}{6}-\dfrac{1}{7}+\dfrac{1}{8}+\dfrac{1}{7}-\dfrac{1}{6}+\dfrac{1}{5}-\dfrac{1}{4}+\dfrac{1}{3}-\dfrac{1}{2}\)