Ответ:

Пошаговое объяснение: 1. log₂x=1, log₂x=log₂2, x=2

2. log₃x=2, log₃x=log₃9, x=9

3. log₄x=0, log₄x=log₄1, x=1

4. log₅x=-2, log₅x=log₅(1/25), x=1/25

5. log₂₅x=-1/2, log₂₅x=log₂₅(1/√25), x=1/5

6. log₈x=1/3, log₈x=log₈∛8, x=2

7. lgx=2, lgx=lg100, x=100

8. logₓ4=2, x²=4, x=√4=2

9. logₓ49=2, x²=49, x=√49=7

10. logₓ(1/27)=-3, x⁻³=1/27=3⁻³, x=3

11. logₓ8=-1/2, x⁻¹/²=(1/64)⁻¹/², x=1/64

12. log₅(4x-3)=2, log₅(4x-3)=log₅25, 4x-3=25, 4x=28, x=7