CB Math Question

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1

<p>K this is probably an easy question but I got it wrong.</p>

<p>This is a math problem from pg 521 #14, from the blue book</p>

<p>For how many ordered pairs of positive integers (x,y) is 2x+3y < 6?
A) one
B) two
C) three
D) five
E) seven</p>

<p>The answer is one because of the coordinate (1,1)...however I thought zero was considered a positive integer? Or is it neither positive or negative? I put down five, because of the points (0,0), (0,1), (1,0), (1,1), (2,0)</p>

2

<p>nope zero isnt considered an integer. Neither pos or negative</p>

3

<p>0 is considered as integer but when it says +ve(positive) intergers then don't consider 0,
+ve integers are 1,2,3,4,........
-ve integers are .......-3,-2,-1
integers are ....-3,-2,-1,0,1,2,3...... including 0</p>