4log2(11) – 6log2(6)6, log2(〖11〗^4/6^6 )6. 8log5(a) + 2log5(b)7, log5(a8·b2)7. 3log4(x) + 9log4(y)8, log4(x3·y9)8. log9(3^3/7)49, ( 3log9(3) – log9(7) )49.
確定! 回上一頁