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yarga [219]
3 years ago
12

Find an explicit rule for the nth term of the sequence.

Mathematics
2 answers:
Pavel [41]3 years ago
5 0
Hello ;
<span>an = 1 • 3n - 1</span>
Flauer [41]3 years ago
4 0

Answer:

Option C is the correct answer.

Step-by-step explanation:

1, 3, 9, 27, ...

This is an example of Geometric progression.

First term, a  = 1

Common ratio, r = 3

We have n th term of GP

            a_n=ar^{n-1}

Substituting

            a_n=ar^{n-1}=1\times 3^{n-1}

Option C is the correct answer.          

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18. A triangle has side lengths of 6, 8, and 9. What type of triangle is it?
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Sunny_sXe [5.5K]

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Read 2 more answers
NEED HELP WITH THIS PLEASE. Just show me how please.
ohaa [14]

Given:

The quadratic equation is:

-5x^2-3x-2=0

To find:

The discriminant of the given equation and the number of real solutions.

Solution:

If a quadratic equation is ax^2+bx+c=0, then the value of discriminant is:

D=b^2-4ac

If D<0, then the quadratic equation has no real roots or two imaginary roots.

If D=0, then the quadratic equation has two equal real roots.

If D>0, then the quadratic equation has two distinct real roots.

We have,

-5x^2-3x-2=0

Here, a=-5,b=-3,c=-2. So, the discriminant of the given equation is:

D=(-3)^2-4(-5)(-2)

D=9-40

D=-31

Since D<0, therefore the number of real solutions is 0.

Hence, the value of the discriminant is -31 and the number of real solutions is 0.

5 0
3 years ago
Which equation describes the same line as y- 5 =-2(x+4)?
Blizzard [7]

Answer:

Step-by-step explanation:

y - 5 = -2(x + 4)

y - 5 = -2x - 8

y = -2x - 8 + 5

y = -2x - 3 <====

or this one..

y = -2x - 3

2x + y = -3 <===

3 0
3 years ago
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