题目

解下列不等式: (1)+n>3;(2). 答案：(1) n≥5且n∈N. (2) m=6. 解析:(1)(n-3)(n-4)+n-3>0, (n-3)(n-3)>0, (n-3)2>0, ∴n≠3.又n-3≥2, ∴n≥5且n∈N. (2)原不等式可化为 , 化简得m2-15m+50<0, (m-5)(m-10)<0, 5<m<10. 又即m≤6, 又m∈N,∴m=6.You must try some of her home-made wine. It’s quite an unforgettable ______. A. experiment        B. experience   C. effort           D. skill