Toán A)32<2^n<128 B)2.16>hoặc=2^n>4 C)9.27 25/07/2021 By Abigail A)32<2^n<128 B)2.16>hoặc=2^n>4 C)9.27 { "@context": "https://schema.org", "@type": "QAPage", "mainEntity": { "@type": "Question", "name": " A)32 hoặc=2^n>4 C)9.274 C)9.27
`a) 32<2^n<128` `⇒2^5<2^n<2^7` `⇒5<n<7` `⇒n=6` `b) 2×16≥2^n>4` `⇒32≥2^n>4` `⇒2^5≥2^n>2^2` `⇒5≥n>2` `⇒n∈{3;4;5}` `c) 9×27≤3^n≤243` `⇒243≤3^n≤243` `⇒3^5≤3^n≤3^5` `⇒5≤n≤5“ `⇒n=5` CHÚC BẠN HỌC TỐT!!! Trả lời