SOLUTION: Please help me out in this sequence of finding r! Thank you so much! Find r given a(sub 0) is -20. and a(sub 4) = -2500 Thank you for your time in helping me!

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Question 634716: Please help me out in this sequence of finding r! Thank you so much!
Find r given a(sub 0) is -20. and a(sub 4) = -2500
Thank you for your time in helping me!
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
Find r given a(sub 0) is -20. and a(sub 4) = -2500
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General Form: a(n) = a0*r^(n-1)
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a(4) = (-20)*r^(3) = -2500
r^3 = 125
r = 5
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Cheers,
Stan H.
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