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
Helpppp pls easy points
solmaris [256]

Answer:

153.94 is the area

Step-by-step explanation:

If the radius is 7p sqrt of 7p and you have your answer

The area of a circle is pi times the radius squared (A = π r²)

6 0
2 years ago
Somebody gimmme the answer to my most recent question on my profile pleaseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
GuDViN [60]
Lol i dont think i can look at your profile and see the question
5 0
2 years ago
A line with a slope of -2 crosses the y-axis at (0, 3). The equation of the line is
Alchen [17]
M = -2 and b = 3
so equation
y = -2x + 3

hope it helps
4 0
3 years ago
5.
kati45 [8]

Answer:

D) 11.

Step-by-step explanation:

y = 5x + p  and the point (-2, 1) is on the line, so substituting for (-2, 1):

1 = 5(-2) + p

p = 1 - 5(-2)

p = 1 + 10

p = 11.

8 0
2 years ago
-(14-2y) +3y+26 how do i find y
Setler79 [48]
Y is behind 2 its in plain sight   
7 0
3 years ago
Other questions:
  • Complete the inequality.<br><br> 11/20 ___ 55%<br><br> &lt;<br> =<br> &gt;
    12·1 answer
  • Find the missing angel by using an equation
    14·1 answer
  • I need help plssssssssssssssss
    5·1 answer
  • A triangle has two sides that measure 14 feet and 13 feet. Which could be the measure of the third side.
    5·1 answer
  • What is 0.9 as a fraction in simplest form
    10·2 answers
  • The function f(x) is a cubic function and the zeros of f(x) are -3, -2, and 1. The y-intercept of f(x) is -24. Write the equatio
    10·1 answer
  • Solve for Y. 9/4y-12=1/4y-4
    13·2 answers
  • Is 1 Greater then -4
    6·1 answer
  • Please answer as soon as possible. Use the graphing tool to graph this system of equations.​
    11·1 answer
  • 1. The original price of the table was $250. Jane bought it on sale for $200.
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!