Câu hỏi của VŨ HOÀNG

Question

9.27 ≤ 3𝑛 ≤ 243 giúp mình câu này ik mn=))

Dang Tung · Accepted Answer

$9.27\le3n\le243\
=>9.27:3\le3n:3\le243:3\=>81\le n\le81\
=>n=81$Câu trả lời: $9.27\le3n\le243\
=>9.27:3\le3n:3\le243:3\=>81\le n\le81\
=>n=81$

Lê Minh Vũ · Answer

$9.27\le3^n\le243$

$3.3^3\le3^n\le3^5$

$3^4\le3^n\le3^5$

$n\in\left\{4,5\right\}$

Vậy: $n\in\left\{4,5\right\}$Câu trả lời: $9.27\le3^n\le243$

$3.3^3\le3^n\le3^5$

$3^4\le3^n\le3^5$

$n\in\left\{4,5\right\}$

Vậy: $n\in\left\{4,5\right\}$