find for an arithmetic sequence
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find for an arithmetic sequence
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Answer:
a1=4
Step-by-step explanation:
an=a1+(n-1)d
a(15)=a1+(n-1)d
-10=a1+(15-1)(-1)
-10=a1(-14)
-10+14=a1
a1=4
There must be wrong choices or the answer is not in the choices.