GRE考试

【单选题】If m²=17, then what is the value of (m+1)(m-1)


网考网参考答案：C
网考网解析：
(m+1)(m-1)=m 2 -1=17-1=16. **Since m 2 = 17, m is slightly more than 4, and (m+1)( m-1) is the product of a number a little greater than 5 and a number a little greater than 3. The only reasonable choice is 16. document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>