Giải:
\(3-\left(-\dfrac{6}{7}\right)^0+\left(\dfrac{1}{2}\right)^2:2\)
\(=3-1+\left(\dfrac{1}{2}\right)^2.\dfrac{1}{2}\)
\(=2+\left(\dfrac{1}{2}\right)^3\)
\(=2+\dfrac{1}{8}\)
\(=\dfrac{17}{8}\)
Chúc bạn học tốt!
2. Tính
a) (\(\dfrac{3}{7}\))\(^{21}\) : (\(\dfrac{9}{49}\))\(^6\)
b) 3- (\(-\dfrac{6}{7}\))\(^0\) + (\(\dfrac{1}{2}\))\(^2\) : 2
Giúp mk vs
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
giúp mk vs ạ
\(\dfrac{12^3.28^2}{18^4.24^3}\)
1 tính
a. \((\left|-5\right|7^4+3^2.2\dfrac{2}{5}):(7^5.125.7^3.50)\)
b. \((\dfrac{3^2}{9}.\dfrac{3^3}{81})^{12}:(\dfrac{3^6}{81^2})^{10}\)
c. \([(\dfrac{1}{2})^2.(\dfrac{1}{3})^4.\dfrac{2}{7}]:\left(\dfrac{1}{3}\right)^{-2}.\dfrac{-2^2}{7}\)
1. Tìm x \(\in\) Q, biết
a) (x-\(\dfrac{1}{3}\))\(^2\) = 0
b) (x+\(\dfrac{1}{2}\))\(^2\) = \(\dfrac{1}{16}\)
c) (2x-1)\(^3\) = 8
Giúp mk vs
\(18\dfrac{2}{7}.\dfrac{3}{4}-6\dfrac{2}{7}.\dfrac{3}{4}\)
\(18\dfrac{2}{7}x\dfrac{3}{4}-6\dfrac{2}{7}x\dfrac{3}{4}\)
giúp giang bài này vs nhoa mn
(2+4+6+...+98+100).[\(\dfrac{3}{5}\):0,7+3.\(\dfrac{-2}{7}\)]:(\(\dfrac{1}{2}\)+\(\dfrac{1}{4}\)+\(\dfrac{1}{6}\)+...+\(\dfrac{1}{98}\)+\(\dfrac{1}{100}\))
mai giang phải nộp bài rùi mn giúp giang mí nha
hứa sẽ like và add fr ạ
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) \(\left(\dfrac{-10}{3}\right)^5.\left(\dfrac{-6}{5}\right)^4\)
