3 years ago

Someone please answer this quickly!Note: T is the center of the circle.

Mathematics

1 answer:

faust18 [17]3 years ago

4 0

Here is my answer. I hope it is helpful.

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Evaluate the series: 2-10+50-250..., n=8

garik1379 [7]

The sum of first 8 terms of series is -130208

Solution:

Given that,

2 - 10 + 50 - 250 , ....

n = 8

Find the common ratio between a term and its previous term

$r = \frac{-10}{2} = -5\\\\r = \frac{-250}{50} = -5$

Thus common ratio is same

This is a geometric series

The sum of terms of geometric sequence is given as:

$S_n = \frac{a_1(1-r^n)}{1-r}$

Where,

r is the common ratio

n is the nth term

$a_1$ is the first term of series

From series,

$a_1 = 2\\\\r = -5\\\\n = 8$

Therefore,

$S_8 = \frac{2 \times (1 - (-5)^8)}{1-(-5)}\\\\S_8 = \frac{2 \times (1-390625)}{6}\\\\S_8 = -130208$

Thus sum of first 8 terms of series is -130208

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4 years ago

Write a description of the rule (X, Y) (x+8,y+6)

Dafna11 [192]

Answer:

You must add 8 to the x and 6 to the y.

Step-by-step explanation:

(x+8,y+6)

x+8 & y+6

Have a nice day!

I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

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2 years ago

What solid figure has eight edges

emmainna [20.7K]

The answer is an octagon.

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Which postulate can be used to prove the triangles shown are congruent ?

gogolik [260]

As we see from the diagram, in order:- side - angle - side are equal

So its SAS

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A cone with volume 5000 m³ is dilated by a scale factor of 15.

QveST [7]

Do you have answer choices or are they just fill in?

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3 years ago

Someone please answer this quickly!Note: T is the center of the circle.​

Someone please answer this quickly!Note: T is the center of the circle.