Помогите пожалуйста !!
4. log₅2 = a; log₅3 = b;
log₅72 = log₅(8 ·9) = log₅8 + log₅9 = 3log₅2 + 2log₅3 = 3a + 2b
5. log₆x = 5log₆2 - 3log₆3 + 4log₆ 1/2
log₆x = log₆2⁵ - log₆3³ - log₆ 2⁴
log₆x = log₆(32 : (27 · 16))
log₆x = log₆(2/27)
x = 2/27