What is the 10th term of the sequence 625, 125, 25, ...?
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OpenStudy (tester97):
@*Insert Name Here* halp pls?
OpenStudy (*insert name here*):
Do you know what kind of sequence this is?
OpenStudy (tester97):
geometric? arithmetic?
OpenStudy (tester97):
idk?
OpenStudy (*insert name here*):
Pretty sure it might be geometric.. so we need to find the ratio now~
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OpenStudy (tester97):
1/5 is ratio
OpenStudy (*insert name here*):
Now just use the formula then :3
OpenStudy (tester97):
i did :/ but i didnt get the right answer.... \[a_{n}=a_{1} r^{n-1}\]then i substituted in the numbers \[a _{10}=625*(\frac{ 1 }{ 5 } )^9\] then i plugged it into the calculator and got some weird number :\
OpenStudy (*insert name here*):
Judging by the ratio and such you probably should xD
Not all math is nice and rainbows
OpenStudy (tester97):
These are my answer choices\[\frac{ 1 }{ 3,125 }~\frac{1}{625}~\frac{1}{1,250}~\frac{1}{15,625}\] and and i dont know what to choose D:
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OpenStudy (*insert name here*):
What answer did you get?
OpenStudy (tester97):
\[3.2_{E}-4\]
OpenStudy (*insert name here*):
What calculator you using?
OpenStudy (tester97):
TI-84 silver edition
OpenStudy (*insert name here*):
Awesome, alright. So once you get the precise answer from that equation. Go to "MATH" and then go to and press "Frac." Press enter again once it appears on the screen. c:
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