3 years ago

If a1=4 and an =2an-1 – 1 then find the value of a4.

1 answer:

7 0

1 = 4

a2 = -2(a1) - 1
a2 = -2(4) - 1
a2 = -9

a3 = -2(a2) - 1
a3 = -2(9) - 1
a3 = -19

Can you do a4 and a5 and answer?

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