Question

[Nguyễn Hữu Giang]

Tìm n sao cho :

a/ 3<3ⁿ < hoặc = 234

b/8.16 >hoặc= 2ⁿ >hoặc= 4

Answer 1

[Lê Văn Trung (тεam ASL)]

a)3<3\(^n\)\(\le\)3\(^5\)

=>n \(\in\){2;3;4;5}

b)8.16\(\ge\)2\(^n\)\(\ge\)4

2\(^3\) . 2\(^4\) \(\ge\) 2\(^n\)\(\ge\)2\(^2\)

=>n\(\in\){2;3;4;5;6;7}

Answer 2

[Đỗ Minh Châu]

=<n [2,3,4,5,6,7]