w ciągu goeometrycznym (bn) mamy dane: b3=18, b6=486. Wyznacz b1 i iloraz ciągu geometrycznego
b₃=18
b₆=486
b₁=?
q=?
b₃*q³=b₆
18*q³=486|:18
q³=27
q=∛27
q=3
b₁*q²=b₃
b₁*3²=18
9b₁=18|:9
b₁=2
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b₃=18
b₆=486
b₁=?
q=?
b₃*q³=b₆
18*q³=486|:18
q³=27
q=∛27
q=3
b₁*q²=b₃
b₁*3²=18
9b₁=18|:9
b₁=2