a)
b)
c)
d)
Tìm giá trị của biểu thức sau
a) 42.4321042.43210
b) (0,6)5(0,2)6(0,6)5(0,2)6
c)27.9365.8227.9365.82
d) 63+3.62+33−13
a) 4^2×4^3/2^10 b) (0,6)^5/(0,2)^6 c) 2^7×9^3/6^5×8^2 d) 6^3+3×6^2+3^3/-13
a) \(\dfrac{2^7.9^3}{6^5.8^2}\)
b) \(\dfrac{\left(0,6\right)^5}{\left(0,2\right)^6}\)
a) \(\dfrac{2^7.9^3}{6^5.8^2}=\dfrac{2^7.\left(3^2\right)^3}{\left(2.3\right)^5.\left(2^3\right)^2}=\dfrac{2^7.3^6}{2^5.3^5.2^6}=\dfrac{3}{2^4}=\dfrac{3}{16}\)
a) \(\dfrac{2^7.9^3}{6^5.8^2}=\dfrac{2^7.\left(3^2\right)^3}{\left(2.3\right)^5.\left(2^3\right)^2}=\dfrac{2^7.3^6}{2^5.3^5.2^6}=\dfrac{2^7.3^6}{2^{11}.3^5}=\dfrac{3}{2^4}=\dfrac{3}{16}\)
b) \(\dfrac{\left(0,6\right)^5}{\left(0,2\right)^6}=\dfrac{\left(0,2.3\right)^5}{\left(0,2\right)^6}=\dfrac{\left(0,2\right)^5.3^5}{\left(0,2\right)^6}=\dfrac{3^5}{0,2}=1215\)
(1/6)^2 . 6^2 + (0,6)^5/ (0,2)^6
\(=\left(\dfrac{1}{6}\cdot6\right)^2+\dfrac{0.2^5\cdot0.3^5}{0.2^5\cdot0.2}\)
\(=1+\dfrac{0.3^5}{0.2}\)
\(=1+\dfrac{243}{20000}=\dfrac{20243}{20000}\)
(1/6)^2 . 6^2 + (0,6)^5/ (0,2)^6
\(\left(\dfrac{1}{6}\right)^2\times6^2+\left(0,6\right)^5\div\left(0,2\right)^6\)
\(=\dfrac{1}{36}\times36+\dfrac{243}{3125}\div\dfrac{1}{15625}\)
\(=1+1215\)
\(=1216\)
\(\left(\dfrac{1}{6}\right)^2\) . \(6^2\) + \(\dfrac{\left(0,6\right)^5}{\left(0,2\right)^6}\)
= \(\dfrac{1}{36}\) . 36 + 1215
= 1 + 1215
= 1216
(0,6)^5/(0,2)^6
Tính:
a,\(\frac{4^2\cdot4^3}{2^{10}}\)
b,\(\frac{0,6^5}{0,2^6}\)
c,\(\frac{2^7\cdot9^3}{6^5\cdot8^2}\)
d,\(\frac{6^3+3\cdot6^2+3^3}{-13}\)
a) \(\frac{4^2.4^3}{2^{10}}\)\
\(=\frac{4^5}{\left(2^2\right)^{10}}=\frac{4^5}{4^{10}}=\frac{1}{4^5}\)
b) \(\frac{0,6^5}{0,2^6}=\frac{\left(0,2.3\right)^5}{0,2^6}=\frac{0,2^5.3^5}{0,2^6}=\frac{3^5}{0,2}=5.3^5\)
(0,6)5/(0,2)6 =?
\(\frac{\left(0,6\right)^5}{\left(0,2\right)^6}=\frac{\left(0,2\right)^5.3^5}{\left(0,2\right)^5.\left(0,2\right)}=\frac{3^5}{0.2}=\frac{243}{0.2}=1215\)
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(0,6)^4 x 4^3 / (0,2)^5 x 6^5 = ?
tính :
(0,6)5 : (0,2)6
(0,6)5 : (0,2)6
= \(\left(\frac{3}{5}\right)^5:\left(\frac{1}{5}\right)^6\)
\(=\frac{3^5}{5^5}:\frac{1^6}{5^6}\)
\(=\frac{3^5}{5^5}.5^6=3^5.5=243.5=1215\)
(0,6)5 : (0,2)6
\(=\left(\frac{3}{5}\right)^5:\left(\frac{1}{5}\right)^6\)
\(=\frac{3^5}{5^5}:\frac{1^6}{5^6}\)
\(=\frac{3^5}{5^5}:\frac{1}{5^6}\)
\(=\frac{3^5}{5^5}.5^6=3^5.6=243.6=1458\)