Question

[Nguyen Tran Thanh Cong]

Tìm n: 2 lũy thừa n+4.2 lũy thừa n=5.2 lũy thừa 5

Answer 1

[phan thuc anh]

2^n+4.2^n=5.2^5

2^n.(1+4)=5.2^5

2^n.5=5.2^5

Suy ra n=5