Answers

2016-06-26T22:26:30+08:00
1. 39,3
39-32=7

an=a1+(n-1)d
=32+(3-1)(7)
=32+(2)(7)
=32+14
an=46

2. answer:0
-9,-6,-3,0,3,6,9

3. 55,35,15,-5,-25

4. answer:1

5. a=1
1+7+1+3=12
3(1)+9=12

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