tolong saya tdk mengerti

7. ²log4 + ²log8 = ²log(4x8) = ²log32 = 5
8. ²log6 - ²log3 + ²log4 = ²log (6÷3x4) = ²log8 = 3
9. ⁹log3 + ⁸log2 + 2.⁴⁹log7 = 1/2 ³log³ + 1/3 ²log2 + ⁴⁹log49 = 1/2 + 1/3 + 1 = 11/6 = 1 5/6
10. ⁷log 9 + ⁷log 343 - ⁷log3² = ⁷log(9 x 343÷9) = ⁷log343 = 3