Tính:
a.(3/7)^21 : (9/49)^6
b. 3+(6/7)^0+(1/2)^2: 2
thuc hien phep tinh
a)(-3/7)^21 : (9/49)^6
b)3-(-67)^0+(1/2)^2 :2
Tính
a) \(\left(\frac{3}{7}\right)^{21}:\left(\frac{9}{49}\right)^6\)
b) \(\left(-\frac{1}{3}\right)^{-1}-\left(-\frac{6}{7}\right)^0+\left(\frac{1}{2}\right):2\)
tính
a,\(6\dfrac{4}{5}-\left(1\dfrac{2}{3}+3\dfrac{4}{5}\right)\)
b,\(7\dfrac{5}{9}-\left(2\dfrac{3}{4}+3\dfrac{5}{9}\right)\)
c,\(6\dfrac{7}{7}-\left(1\dfrac{3}{4}+2\dfrac{5}{7}\right)\)
Tính:
a,253:52
b,\(\left(\frac{3}{7}\right)^{21}:\left(\frac{9}{49}\right)^6\)
c\(3-\left(\frac{-6}{7}\right)^0+\left(\frac{1}{2}\right)^2:2\)
a, \(5^6\) : \(5^5\) + \(\left(\dfrac{4}{9}\right)^0\) b,\(\left(\dfrac{3}{7}\right)^{21}\) : \(\left(1-\dfrac{40}{49}\right)^3\) c, 3.\(\left(\dfrac{2}{3}\right)^3\) -\(\left(\dfrac{-52}{3}\right)^0\) +\(\dfrac{4}{9}\)
Mọi người giúp mình với
bài 1: Tìm X thuộc Q, biết rằng
a/ (x- 1/2)^2 = 0
bài 2 : Tính
a/ 25^3 : 5^2
b/ (3/7)^21 : (9/49)^ 6
c/ 3-(-6/7) ^0 + (1/2)^2 : 2
bài 3 : viết các biểu thức số sau dưới dạng a^n (a thuộc Q , n thuộc N )
a/ 9. 3^3 .1/81.3^2
b/ 4.2^5 : (2^3. 1/16)
c/ 3^2.2^5.(2/3)^2
d/ (1/3)^2 .1/3 .9^2
a) \(\left(\frac{3}{7}\right)^{21}:\left(\frac{9}{49}\right)^6\)
b) \(3-\left(-\frac{6}{9}\right)^0+\left(\frac{1}{2}\right)^2:2\)
Tính:
a) \(25^{3\div}5^2\)
b) \(\left(\frac{3}{7}\right)^{21}\div\left(\frac{9}{49}\right)^6\)
c) \(3-\left(-\frac{6}{7}\right)^0+\left(\frac{1}{2}\right)^2\div2\)