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Zinaida [17]
3 years ago
7

If a1 = 8 and an =an-1-3 then find the value of a5

Mathematics
1 answer:
MariettaO [177]3 years ago
8 0

Answer:

a_5=-4

Step-by-step explanation:

a_n=a_{n-1}-3\\\\a_1=8\\\\a_2=a_1-3\to a_2=8-3=5\\\\a_3=a_2-3\to a_3=5-3=2\\\\a_4=a_3-3\to a_4=2-3=-1\\\\a_5=a_4-3\to a_5=-1-3=-4

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