Bài 2: Giải pt, bpt sau:

8) \(9^{x^2+x-1} -10. 3^{x^2+x-2} +1=0\)

Bài 2: Giải pt, bpt sau:

7) \(\dfrac{2.3^x - 2^{x+2}}{3^x-2^x} ≤ 1\)

24. Social networks provide a common forum for representatives of all fields shared an interest in the study of social relations.

SỬA LỖI SAI

4. jellyfish, submarine, conservation, magazine (STRESS)