Respuesta :

calculista
the correct question in the attached figure

case A) an=2^(n-1)
for n=8
a8=2^(8-1)-----> a8=2^7----> a8=128

the answer case A) is 
a8=128

case B) an=7
then for n=8
a8=7

the answer case B) is
a8=7

case C) an=1+(-1)^n
for n=8
a8=1+(-1)^8----> a8=1+1----> a8=2

the answer case C) is
a8=2

case D)an=-(-2)^n
for n=8
a8=-(-2)^8----> a8=-256

the answer case D) is
a8=-256
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