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3 years ago

Y=x^2-2x-8

Mathematics

2 answers:

gizmo_the_mogwai [7]3 years ago

6 0

Answer: vertex- (1,-9)

x intercepts- (4,0) (-2,0)

y intercepts- (0,-8)

axis of symmetry- x-1

minimum

Step-by-step explanation:

Lostsunrise [7]3 years ago

5 0

1. (1,-9)

2. (4,0) or (-2,0)

3. (0,-8)

4. x=1

5. -9 or 1

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Answer:

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3 years ago

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ddd [48]

Answer:

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Step-by-step explanation:

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3 years ago

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Answer:

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2 years ago

2. Find the common difference and the recursive formula. a. 22, 19, 16, 13, …

Musya8 [376]

Answer:

The common difference d is d = -3

The recursive formula is: $\mathbf{a_n=a_{n-1}-3}$

Step-by-step explanation:

We need to find the common difference and the recursive formula.

a. 22, 19, 16, 13, …

First we will find common difference

The formula of arithmetic sequence is: $a_n=a_1+(n-1)d$

where a_n is nth term, a_1 is 1st term and d is the difference

Looking at the sequence we get: a_1=22, a_2=19

Using these values we can find d, the common difference

$a_n=a_1+(n-1)d\\put\:n=2, a_2=19, a_1=22\\19=22+(2-1)d\\19=22+d\\d=19-22\\d=-3$

So, the common difference d is d = -3

Now, we will find the recursive formula:

The recursive formula is of type: $a_n=a_{n-1}+d$

We have found common difference d = -3

So, the recursive formula will be:

$a_n=a_{n-1}+d\\a_n=a_{n-1}+(-3)\\a_n=a_{n-1}-3$

The recursive formula is: $\mathbf{a_n=a_{n-1}-3}$

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3 years ago