Решите пожалуйста: 1) log√3 63 – log3 49
+ log 1/3 3 = ?
2) (log0,75 2)(log2 9-4) - log3 1/27 + log1/3 27 = ?
3) lg 1/2 + lg 2/3 + lg 3/4+...+ lg 89/100 = ?
4) log1/2 √2 = ?

Заранее спасибо!
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