first term n= 1
A(1) = -3. 2 (1)-1
= -3. 2(1)-1
= -3 .2-1
= -3. 1
= -3
fourth term n = 4
A(4) = -3. 2(4) -1`
= -3. 8 -1
= -3 . 7
= -21
8th term n = 8
A(8) = -3 .2(8) -1
= -3. 16-1
= -3. 15
= -45
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