What is the next term in the following sequence: 3, -15, 75, -375…? What is the rule for the following sequence: 8, 4, 2, 1…?

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What is the next term in the following sequence: 3, -15, 75, -375…? What is the rule for the following sequence: 8, 4, 2, 1…?

Mathematics
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for the first one calculate second term / first term and third term / second term what do you notice?
1. 1875 2. Dividing by 2.
for the first one i think it is an = a1 * (1/2)(n-1), a1 = 8 btw

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Other answers:

@Kash_TheSmartGuy please don't give direct answers - read the code of conduct
Sorry
But the second ones answer isn't on the choices
the first one is a geometric sequence where the next term is obtained by multiplying by a common ratio
the second one is also geometric - do you know what the nest number is?
you mean next
and I think it should be .5
yes not nest!!
right each term is formed by multiplying by 0.5 - same thing as dividing by 2 as Kash said
and if you do the divisions i mentioned in my first post you'll get the common ratio for the first sequence
and to get the next term you multiply -375 by this common ratio
an = a1 * (1/2)(n-1), a1 =8 I guess maybe

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