Answer:
a(8) = -12
Step-by-step explanation:
The 8th term in the sequence is when n = 8. Substitute x = 8 into the rule An=-2x+4.
a(8) = -2(8) + 4
a(8) = -16 + 4
A∣=3(8−7)+1(−2−4)=3−6=−3
co-factor matrix =
⎣
⎢
⎡
−1
5
3
−4
23
−11
1
−6
⎦
⎥
⎤
Adj.A=
12
A
=
∣A∣
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