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QveST [7]
3 years ago
10

what is the Recursive Formula and the Explicit Formula for Let a1=2, 9, 16, 23, and Let a1=2, 14, 98, 686, ...

Mathematics
1 answer:
Romashka [77]3 years ago
7 0

Answer:

Step-by-step explanation:

I don’t know why they bother teaching recursive formulas as the explicit is almost always used :)

For 2,9,16,23...

Recursive is a(n+1)=an+7

Explicit is an=2+7(n-1)

(or more neatly an=7n-5)

For 2,14,98,686...

Recursive is a(n+1)=7an

Explicit is an=2(7^(n-1))

(or (2/7)7^n )

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A circle is divided into 3 equal parts. What is the total angle measure of 1 part?
fenix001 [56]

Answer:

120 degrees each

Step-by-step explanation:

360 degress divided by 3 = 120

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2 years ago
Help please!!! Thanks
Radda [10]

Answer:

A

Step-by-step explanation:

4 0
3 years ago
Somebody help me on this real quic plz
katrin [286]
Basically you are just multiplying 2 with the x-values. So...
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5 0
3 years ago
A person invests $2,740 in an account that earns 4.3% annual interest. Find when the value of the investment reaches $7,000. If
Juli2301 [7.4K]

So, to set up your equation is the hardest part. If you remember the basic format, you're set.

I(t) = P * (1+r%)^t

t= time and this will be our variable

Initial amount P = $2740

Rate = 4.3% which converts numerically into .043

I(t) = 7000

Before we get to find out how to find how many years it takes to get to $7000, set up the basic equation by plugging in what we know.


I(t) = $2740(1+4.3%)^t

I(t)=2740(1.043)^t

Now plug in for $7000 for I(t)

7000=2740(1.043)^t                 Divide both sides by 2740

7000/2740 = 2740/2740(1.043)^t

2.55474453=(1.043)^t

Now you can solve for t in two ways. You can either use the natural log or graph it on your graphing calculate and see when the two equations meet.

In your calculator you can set up:

ln(2.55474453)/ln(1.043) = t                 which is the method I prefer since it's much simpler

t=22.278528

but you can also graph it in your ti-84

with

y1=2.55474453

y2=(1.043)^x

and find where they intersect on the graph.

either way it'll be the same answer

3 0
3 years ago
What is the slope of the line represented by the equation y = -1.8x - 2?
rusak2 [61]

Answer:

y = mx + b

-1.8 is the slope

-1.8 in fraction form is -9/5

-9/5

Step-by-step explanation:

8 0
2 years ago
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