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konstantin123 [22]
3 years ago
7

Find the oth term of the geometric sequence 9, -27, 81, ...

Mathematics
1 answer:
Novosadov [1.4K]3 years ago
6 0
It would b 9 x (-3^(x-1))
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Simplify the expression. Write your answer as a power.
Masja [62]

Answer:

this is your answer

{9}^{4}

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3 years ago
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For each function f(n) and time t in the table, determine the largest size n of a problem that can be solved in time t, assuming
egoroff_w [7]
First recall that a microsecond is 10^−6 seconds. Hence, one second = 10^6 microseconds, one hour = 3600000000 = 3.6 • 10^9 microseconds, one month (assume a month has 30 days) = 2592000000000 = 2.592 • 10^12 microseconds, and one century = 3110400000000000 = 3.1104 • 10^15 microseconds.

Row 1: f(n) = log n In this case, we need to determine the largest n such that log n ≤ 1000000. To solve this inequality, we need to rewrite the inequality as 2^logn ≤ 2^1000000 or n ≤ 2^1000000. Recall from lecture that 2^10 ≈ 10^3, thus we have that 2^1000000 = 2^10•100000 = (2^10)^100000 ≈ (10^3)^100000 = 10^300000. This is the result given in the textbook. For one hour, we have that n ≤ 2^3600•1000000 and thus n ≈ 10^1080000000.

Row 8: f(n) = n! For us to see that the largest sized input is 12 that can be processed within an hour when f(n) = n! one can simply, compute 12! And verify that it is less than the number of microseconds in one hour, but that 13! is greater than the number of microseconds in an hour.

Row 4: f(n) = n log n In this case, use Maple to solve equations like n log n−1000000 = 0. The Maple command for solving this equation is fsolve(n*log[2](n) - 1000000 = 0)
8 0
4 years ago
Describe the motion of a car with an acceleration of –2 m/s2.
AURORKA [14]
I'm not sure exactly about the squared part but that would be going backwards with a rate of -2 m/s.
7 0
4 years ago
If a = 2, b = -3 and c = -4, evaluate |a - 5| - 1
Misha Larkins [42]

Answer:

2

Step-by-step explanation:

the absolute value of a-5 is 3, 3-1 is 2

6 0
4 years ago
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A 6-inch candle burns down in 12 hours. After how many hours will it have burned<br> 4 inches?
Zielflug [23.3K]

Answer:

8 hours

Step-by-step explanation:

Let's first find how many inches the candle would have burned in 1 hour.

6 in:12 hours

x: 1 hour

We can divide 12 by 12 to get 1. This means we need to divide 6 by 12 to get x

x=1/2 inches

1/2 inches:1 hour

4 inches: x hours

We divide 4 by 1/2 to get 8. 1/2*8=4. This means...

x=1 hour*8=8 hours

6 0
3 years ago
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