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goldenfox [79]
3 years ago
11

Help please quick it's for my grades

Mathematics
1 answer:
Rzqust [24]3 years ago
8 0

I think it is 14, I’m not sure tho

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Write the explicit formula that represents the geometric sequence -2, 8, -32, 128
Jet001 [13]

The Geometric Sequence Formula:

a_n=a_1r^{n-1}

We have:

a_1=-2,\ a_2=8,\ a_3=-32,\ a_4=128,\ ...

d=\dfrac{a_{n+1}}{a_n}\to d=\dfrac{8}{-2}=-4

Substitute:

a_n=-22\cdot(-4)^{n-1}=-22\cdot(-4)^n\cdot(-4)^{-1}=-22\cdot(-4)^n\cdot\left(-\dfrac{1}{4}\right)=5.5(-4)^n

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Answer: 1/2 I believe :-)

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3 no. Answer is 33 in my gess
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3 years ago
Does anyone know how to do these??​
Brrunno [24]

Answer:

b)

c=140°

a= 40°

b=40°

c)

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q= 60°

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d)

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Step-by-step explanation:

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