Question

So sánh :\(\left(^{\frac{1}{27}}\right)^{23}\)với \(\left(\frac{1}{81}\right)^{16}\)

Answer 1

\(\left(\frac{1}{27}\right)^{23}=\frac{1^{23}}{27^{23}}=\frac{1}{\left(3^3\right)^{23}}=\frac{1}{3^{69}}\)

\(\left(\frac{1}{81}\right)^{16}=\frac{1^{16}}{81^{16}}=\frac{1}{\left(3^4\right)^{16}}=\frac{1}{3^{64}}\)

Vì 3⁶⁹ > 3⁶⁴

\(\frac{1}{3^{69}}< \frac{1}{3^{64}}\)

Answer 2

\(\left(\frac{1}{27}\right)^{23}=\frac{1^{23}}{27^{23}}=\frac{1}{\left(3^3\right)^{23}}=\frac{1}{3^{69}}\)

\(\left(\frac{1}{81}\right)^{16}=\frac{1^{16}}{81^{16}}=\frac{1}{\left(3^4\right)^{16}}=\frac{1}{3^{64}}\)

Vì 3⁶⁹ > 3⁶⁴

=> \(\frac{1}{3^{69}}< \frac{1}{3^{64}}\)

=> \(\left(\frac{1}{27}\right)^{23}< \left(\frac{1}{81}\right)^{16}\)