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If a1 =2 and an= -2an-1 then find the value of a4

If a1 =2 and an= -2an-1 then find the value of a4
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2 votes
If a1 =2 and an= -2an-1 then find the value of a4

User James Pleasant
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1 Answer

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The value of a is 1 and the value of a4 is 5
User Rashi Abramson
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