Question

[Nguyentrang]

tinh 

a, 3mu2.1phan243.81mu2.1phan3mu3

b,(4.2mu5) :(2mu3.1phan16)

Answer 1

[kudo]

\(3^2\cdot\frac{1}{243}\cdot81^2\cdot\frac{1}{3^3}\)

\(=3^2\cdot\frac{1}{3^5}\cdot3^{4\cdot2}\cdot\frac{1}{3^3}\)

\(=3^2:3^5\cdot3^8:3^3\)

\(=3^{2-5+8-3}\)

\(=3^2\)

Answer 2

[kudo]

\(\left(4\cdot2^5\right):\left(2^3\cdot\frac{1}{16}\right)\)

=\(\left(2^2\cdot2^5\right):\left(2^3:2^4\right)\)

=\(2^2\cdot2^5:2^3:2^4\)

=\(2^{2+5-3-4}\)

=\(2^0=1\)