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help me please

 
 Jun 5, 2021
 #1
avatar+113569 
+1

This sequence is a GP

does that help?

 

What is a?  What is r?  What is the formula for the sum of a GP (n terms)?

 

Simplify the number expression but keep it as a fraction.

 

Put the 2 equal to each other and solve.

 

If you get stuck show us what you have done.

 
 Jun 5, 2021
edited by Melody  Jun 5, 2021

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