I need help with an algebra problem

label Algebra
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Dec 5th, 2015

Thank you for the opportunity to help you with your question!

1) s7 = a1(1-q^7)/(1-q)  = 5*(1)*(1-(-3)^7)/(1-(-3)) = 5*(1+3^7)4 = 2735 

2) S8 = a1(1-q^7)/(1-q)  = 1/2*(1-(1/2)^8)/(1-1/2) = 1-(1/2)^8 = 255/256

Please let me know if you need any clarification. I'm always happy to answer your questions.
Dec 5th, 2015

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