Question

[Nguyen Hai Bang]

a, (  \(\frac{3}{7}\))\(^{21}\): ( \(\frac{9}{49}\))\(^6\)                       f, ( 0,25 )\(^4\). 1024

b, \(\frac{390}{130}\)\(^4\)                                            g, (0,125 )\(^4\). 2048

c, ( 0,125 )\(^3\). 512                                      h, \(\frac{120}{40}\)\(^3\)

d, \(\frac{4}{\left(0,125\right)}\)\(^2\)

e,\(\frac{3}{\left(0,375\right)}\)\(^2\)

Answer 1

[Đặng Tiến]

a) \(\left(\frac{3}{7}\right)^{21}:\left(\frac{9}{47}\right)^6=\left(\frac{3}{7}\right)^{21}:\left[\left(\frac{3}{7}\right)^2\right]^6=\left(\frac{3}{7}\right)^{21}:\left(\frac{3}{7}\right)^{12}=\left(\frac{3}{7}\right)^{21-12}=\left(\frac{3}{7}\right)^9\)

b) \(\frac{390}{130}^4=3^4=81\)

c) \(\left(0,125\right)^3.512=\frac{1}{512}.512=1\)