Sederhanakan: 7 log 1/5 × 5 log 49 yg bisa jawab benar orangnya hebat.... >.<

7 log 1/5.5 log 49
7 log 5^-1.5 log 49
(-1) 7 log 5.5 log 49
(-1) 7 log 49
(-1).2
-2