题目
题型:单选题难度:简单来源:不详
12 |
x+3 |
A.4 | B.5 | C.10 | D.12 |
答案
12 |
x+3 |
x是正整数,且y是整数,由此可得x=-15,-9,-7,-6,-5,-4,-2,-1,0,1,3,9;
此时y的值分别为:-1,-2,-3,-4,-6,-12,12,6,4,3,3,1,
符合条件的x共有12个,
故选D.
核心考点
举一反三
A.3个 | B.6个 | C.9个 | D.8个 |
A.2 | B.3 | C.4 | D.无数个 |
12 |
x+3 |
A.4 | B.5 | C.10 | D.12 |
12 |
x+3 |
A.3个 | B.6个 | C.9个 | D.8个 |
A.2 | B.3 | C.4 | D.无数个 |