1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jekas [21]
3 years ago
10

Gretchen has a set of blocks of heights 1, 2, and 4-centimeters. Imagine stacking the blocks one on top of the other to make a t

ower of height n centimeters. For example, a tower of height 6 centimeters could be made by stacking 6 1-cm blocks, 3 2-cm blocks, a 4-cm block on top of a 2- cm block, a 2-cm block on top of a 4-cm block, etc. (Order in the stack matters, think of the blocks of different heights as different colors and the stack looks different if two different color blocks are switched.) Let me be the number of ways to construct a tower of height n centimeters. Find a recursive formula for nB and try to find a formula that only depends on n.
Mathematics
2 answers:
notsponge [240]3 years ago
4 0

Answer:

t_{n}=t_{n-1}+t_{n-2} +t_{n-4}

Step-by-step explanation:

t_{n}=multiple ways to climb a tower

When n = 1,

tower= 1 cm  

t_{1}= 1

When n = 2,

tower =2 cm   

t_{2}= 2

When n = 3,

tower = 3 cm

it can be build if we use three 1 cm blocks

t_{3} = 3

When n = 4,

tower= 4 cm

it can be build if we use four 1 cm blocks

t_{4} = 6

When n > 5

tower height > 4 cm

so we can use 1 cm, 2 cm and 4 cm blocks

so in that case if our last move is 1 cm block then t_{n-1} will be

n —1 cm

if our last move is 2 cm block then t_{n-2} will be

n —2 cm

if our last move is 4 cm block then t_{n-4} will be

n —4 cm

 

t_{n}=t_{n-1}+t_{n-2} +t_{n-4}

Helga [31]3 years ago
3 0

Answer:

tn = t[n-1] + t[n-2] + t[n-4] . . .

Step-by-step explanation:

Let t_n = number of ways of constructing height n.

The last block of a tower of height n can be a 1, 2, or 4.

so it was added to a tower of height n-1, n-2, or n-4 respectively.

Time to try: tn = t[n-1] + t[n-2] + t[n-4] . . . (correct)

1 = 1 from 1

2 = 2 from (2) or (1,1)

3 = 3 from (1,1,1) or (2,1) or (1,2)

4 = 6 from (1,1,1,1) (1,1,2) (1,2,1) (2,1,1) (2,2) (4)

5 = 10 from

1 x (1,1,1,1,1)

4 x (1,1,1,2)

3 x (1,2,2)

2 x (1,4)

6 = 18 from

2 x (4,2) ...

3 x (4,1,1) ...

1 x (2,2,2) ...

6 x (2,2,1,1) ...

5 x (2,1,1,1,1) ..

1 x (1,1,1,1,1,1) ..

Prediction for 7 is t6 + t5 + t3 = 18 + 10 + 3 = 31

6 x (4,2,1)

4 x (4,1,1,1)

4 x (2,2,2,1)

10 x (2,2,1,1,1)

6 x (2,1,1,1,1,1)

1 x (1,1,1,1,1,1,1)

Total =31

You might be interested in
Pls give the answer given below!ASAP
bekas [8.4K]

Answer:

<em>Option </em><em>3</em>

Step-by-step explanation:

Rewriting input as fractions if necessary:

3/8, 3/20

For the denominators (8, 20) the least common multiple (LCM) is 40.

LCM(8, 20)

Therefore, the least common denominator (LCD) is 40.

Calculations to rewrite the original inputs as equivalent fractions with the LCD:

3/8 = 3/8 × 5/5 = 15/40

3/20 = 3/20 × 2/2 = 6/40

8 0
2 years ago
Round 5540.33990183 to 3 decimal place
kogti [31]

Answer:

5540.340 is rounded to the 3rd decimal place

8 0
3 years ago
Determine the equation for the line of best fit using (1996,47) (2012,41)
Natasha2012 [34]

Answer:

ghdfdjyt

Step-by-step explanation:

fgdhfdgjytdjdfty

8 0
2 years ago
What is the factored form of x^2 - 196 ?
Luba_88 [7]
D. (x-14)(x+14)
a negative and a positive multiplied makes a negative outcome so -14•+14=-196. x•x is = to x^2
8 0
3 years ago
Read 2 more answers
Ann is participating in a 4-day cross country biking challenge. She biked for 65, 69, and 45 miles on the first three days. How
GenaCL600 [577]

Answer:

the answer is 69

hope i helped <3

Step-by-step explanation:

6 0
2 years ago
Other questions:
  • Mr reinard bought 5 pounds of feed for his chickens for $10. how much did the feed cost per pound in dollars
    10·1 answer
  • Ayuda por favor no entiendo esta pregunta?????
    14·1 answer
  • <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B4%7D%20%20%5Ctimes%2012" id="TexFormula1" title=" \frac{3}{4} \times 12"
    9·1 answer
  • A hummer gets 300 miles on 20 gallons of gas how many on 50 gallons of gas
    12·1 answer
  • Wendy’s Drive-Through Fast-food restaurants spend quite a bit of time studying the amount of time cars spend in their drive-thro
    7·1 answer
  • What is the simplified form of x + 3/3 + x + 6/3
    7·2 answers
  • 1000 views=£2<br> how many views are required to make £31?
    10·1 answer
  • -1 to the 5 power + (-1+3) to the 2nd power
    12·1 answer
  • Hi please help me , this is my exam
    12·1 answer
  • 1. The ratio of monthly income to the savings in a family is 5:4. If the savings be $9000, find the income and the expenses.​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!