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Sveta_85 [38]
3 years ago
15

Find a recursive formula for the sequence: 3, -5, 11, -21

Mathematics
1 answer:
vekshin13 years ago
3 0

The correct option is the last:

a_n = -2a_{n-1}+1

In fact, every term in the sequence is one more than twice the opposite of the previous one:

We start with 3. Twice its opposite is -6. Plus one, we get -5.

We start with -5. Twice its opposite is 10. Plus one, we get 11.

We start with 11. Twice its opposite is -22. Plus one, we get -21.

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Is the answer 200? Or 4.5??? Or is none ? I don't know it's confusing :/ can I get help :/
skelet666 [1.2K]
Let x = the number of penguins we are finding

x ÷ 100 × 30 = 15
x = 15 ÷ 30 × 100
x = 50

hope this helps and have a great day :)


6 0
3 years ago
Read 2 more answers
Round to the nearst tenth
Serga [27]

Answer:

Step-by-step explanation:

4 0
3 years ago
Where are the asymptotes of f(x) = tan(4x − π) from x = 0 to x = pi over 2 ?
vladimir1956 [14]
tan(4x- \pi )= \frac{sin(4x- \pi )}{cos(4x- \pi )}

The asymptotes are where the graph is undefined. Since: tan(x) =sin(x)/cos(x)
It is where cos(4x-π) = 0

cos(4x-π) = 0 when the inside is -π/2 , π/2 , 3π/2

4x - π = π/2
4x = π/2 + π
4x = 3π/2
x = 3π/8

4x - π = 3π/2
4x = 3π/2 + π
4x = 5π/2
x = 5π/8
This ones outside the interval (5π/8 > π/2) , try -π/2

4x - π = -π/2
4x = -π/2 + π
4x = π/2
x = π/8

Asymptotes are π/8 and 3π/8




4 0
3 years ago
Martina and charlotte are sharing a pizza.The pizza is cut into eight pieces. Martina ate a quarter of the pizza. Charlotte ate
Zigmanuir [339]

Answer:

4 pieces

Step-by-step explanation:

This is because 3 add 1 makes 4 and 8 minus 4 makes 4

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MORNING LOVES! LETS TALK ABOUT 7TH GRADE MATH!
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Answer:

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Step-by-step explanation:

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8 0
3 years ago
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