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What is the value of the fourth term in a geomtric sequence for which a1=15

What is the value of the fourth term in a geomtric sequence for which a1=15
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What is the value of the fourth term in a geomtric sequence for which a1=15

User Simon Fox
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1 Answer

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Hello,

If you know the ration (i don't)
a(4)=a(3)*r=a(2)*r²=a(1)*r^3
==>a(4)=15*r^3



User GreenKiwi
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