viewimage.php?id=20bcc42e&no=24b0d769e1d32ca73cee82fa11d028317b450a23a99188d24b1fcb77b60ab577b9ca41638d593b87e7750ad3e13f28a8ef45f58d720d5768867385


답은 -2고 -log_3 7은 -1.77....입니다.