[問題]GWD0-32

[bugubugu]

Q32:
If S is a set of ten consecutive integers, is the integer 5 in S?
(1) The integer –3 is in S.
(2) The integer 4 is in S.

這題要如何思考勒?
可否給個思路...

[homaru]

應該是E吧
因為就算聯立
-5~4 裡面不包含5, 但包含-3 and 4
-3~6 and -4~5 裡面包含5, 也包含-3 and 4
所以都有可能

[chris8888]

please draw a numeric line, and then mark numbers on the line to see how the numbers interacte with each other.

Then you will know the answer. So the point is draw a line to see what happens.