+ 2logc + b 21. log2 ( x - 1 ) = log2 ( x – 3 ) log4 ( x - 1 ) = 2log , ( x – 3 ) = log , ( x – 3 ) 2 x - 1 = x2 + 9 - 6x x ? – 7x + 10 = 0 a .
確定! 回上一頁