Oblicz a₆, a₇, S₆, S₇, S₃⁻₇ gdy:
a) a₁= 28/3
q= ½
b) a₁=28
q=(-½)
c) a₁=100
q=1,1
d)a₂=16
a₃=32
e)a₈=10
a₉= -20
f)a₁=3
a₃=12
g) a₃=1
a₅=9
h) a₁=2
a₄=16
i)a₂=2
a₅= -16
j) a₃=100
a₁₇=100
k) a₂=80
a₁₁= -8
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a)
a
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