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andrey2020 [161]
3 years ago
6

Write an explicit formula that represents the geometric sequence -2,8,-32,128

Mathematics
1 answer:
jonny [76]3 years ago
5 0

Hello from MrBillDoesMath!

Answer:

a(n) =  (-1)^(n+1)   *   ( 2 ^ (2n+1) )                    where n = 0, 1, 2, etc.

Discussion:

-2 =   (-1) * 2^1

8 =    (+1) 2^3

-32 = (-1) * 2^5

128 = (+1)* 2^7


In general,

a(n) =  (-1)^(n+1)  *   (2 ^ (2n+1))                    where n = 0, 1, 2, etc.


Regards,  

MrB

P.S.  I'll be on vacation from Friday, Dec 22 to Jan 2, 2019. Have a Great New Year!


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Answer:

C) (x-2)(x+3)

Step-by-step explanation:

x^2+x-6=(x-2)(x+3)

Because (x-2)(x+3)=x^2-2x+3x-6=x^2+x-6.

4 0
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Umnica [9.8K]

The probability of pulling a blue marble and the coin landing tails up is 360/2500

<h3>How to determine the probability?</h3>

The tables of values are given as:

Color     Times

Blue        18

Green     20

Yellow    12

Heads    Tails

20          30

The probability of obtaining a blue marble is:

P(Blue) = 18/50

The probability of landing tails up is:

P(Tail) = 20/50

The required probability is:

P = P(Blue) * P(Tail)

This gives

P = 18/50 * 20/50

Evaluate the product

P = 360/2500

Hence, the probability of pulling a blue marble and the coin landing tails up is 360/2500

Read more about probability at:

brainly.com/question/25870256

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1 year ago
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3 0
3 years ago
Amir is sorting his stamp collection. He has made a chart of what countries the stamps are from
natulia [17]

Answer:

Step-by-step explanation:

Given that Amir is sorting his stamp collection. He has made a chart of what countries the stamps are from

He got results as

France 1/3  

Morocco 5/12  

Spain 1/6

To find out what fraction of Amir's stamps are from France, Morocco, or Spain, we have to simply add the three as there is common element between any two pairs

Hence answer is

\frac{1}{3} +\frac{5}{12} +\frac{1}{6}\\ =\frac{11}{12}

8 0
3 years ago
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adelina 88 [10]

Answer:

f(t) = $67000(.30)^t          (Must use " ^ " to indicate exponentiation)

Step-by-step explanation:

This is an exponential function:

f(t) = $67000(.30)^t  (Must use " ^ " to indicate exponentiation)

4 0
2 years ago
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