Answers

2016-07-14T21:48:55+08:00
An=A1+(n-1)d
A4=A1+(4-1)(-3)
10=A1+(3)(-3)
10=A1-9
10+9=A1
→19=A1←

A2=19+(2-1)(-3)
=19+(1)(-3)
=19-3
→ A2=16←

A3=19+(3-1)(-3)
=19+(2)(-3)
=19-6
→A3=13←

Answer:
19,16,13→ first three terms kumbaga nagdecrease siya.



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