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3 years ago

Find the common ratio and the explicit formula -3, 9, -27, 81,

Mathematics

1 answer:

Fofino [41]3 years ago

6 0

Answer:

see explanation

Step-by-step explanation:

These are the terms of a geometric sequence with n th term

$a_{n}\\$ = a $(r)^{n-1}$

where re a is the first term and r the common ratio

r = 9 ÷ - 3 = - 27 ÷ 9 = 81 ÷ - 27 = - 3 ← common ratio

and a = - 3, thus

[te x]a_{n}[/tex] = - 3 $(-3)^{n-1}$ ← explicit formula

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kompoz [17]

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add 11 to each side to isolate c

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Step-by-step explanation:

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2 years ago

The number of purses a vendor sells daily has the probability distribution represented in the table. Number of Purses, x 0 1 2 3

Arada [10]

Answer:

(D)$81

Step-by-step explanation:

Given that the number of purses a vendor sells daily has the probability distribution represented in the table.

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$E(x)=(0X0.35)+(1X0.15)+(2X0.2)+(3X0.2)+(4X0.03)+(5X0.07)\\=0+0.15+0.4+0.6+0.12+0.35\\E(x)=1.62$

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The correct option is D.

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3 years ago

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Luda [366]

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2 years ago

How do you solve for this: f(x)=60-0.18x

Alexxandr [17]

You can put it in a graphing calculator.

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3 years ago

Find the common ratio and the explicit formula -3, 9, -27, 81,​

Find the common ratio and the explicit formula -3, 9, -27, 81,