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what is the 7th term of the geometric sequence -1,4,-16,...? Answers to choose from. a)-16,384 b)-4,096 c)4,096 d)16,384

Mathematics
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\[T _{n}=ar ^{n-1}\]
a= first term r = ratio between consecutive terms n = number of terms
ok

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Can anybody solve this??
Yeah, use @Skaematik's formula. Just plug in what you know.
To get \(r\), what are you multiplying between each term?
@Skaematik are you sure the formula is right i got -4,096 and i dont believe that to be correct
-1 times what gives you 4? 4 times what gives you -16?
-4
Well, the first thing to check is that it's negative. Since it's odd, and your odd terms are negative, it makes sense that it, too, is negative.
ok
Why don't you think -4096 is correct?
because i thought it would have came out positive to 4,096 but i got -4,096
-4096 is correct.
ohh thank you both of you @geoffb @Skaematik

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