11 tháng 11 2022 lúc 10:37
\(\left(0,343\right)^8và\left(-0,7\right)^{26}\)
\(\left(-0,7\right)^{26}\)
\(=\left(0,7\right)^{26}\)
\(=\left(0,7\right)^{24}.\left(0,7\right)^2\)
\(=\left[\left(0,7\right)^3\right]^8.\left(0,7\right)^2\)
\(=\left(0,343\right)^8.\left(0,7\right)^2\)
Vì \(\left(0,7\right)^2< 1\)
\(\Rightarrow\left(0,343\right)^8.\left(0,7\right)^2< \left(0,343\right)^8\)
Hay \(\left(-0,7\right)^{26}< \left(0,343\right)^8\)
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