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11Alexandr11 [23.1K]
2 years ago
5

Write an explicit formula for an, the nth term of the sequence 4, 20,100. WILL GET BRAINLIEST!!!!!​

Mathematics
2 answers:
anygoal [31]2 years ago
5 0

Answer:

aₙ = 4(5)ⁿ⁻¹

Explanation:

To identify a geometric series: second term = √(first term * third term)

Here given:

  • 1st term: 4
  • 2nd term: 20
  • 3rd term: 100

check ============

20 = √(100*4)

20 = √400

20 = 20  Hence its a geometric term.

Find common difference (r):

20/4 = <u>5</u>       or     100/20 = <u>5</u>

Geometric term formula:
aₙ = a₁(r)ⁿ⁻¹               [where a1 is the 1st term, r is common difference]

<u>insert values found</u>

aₙ = 4(5)ⁿ⁻¹ ......this is the nth term.

Ganezh [65]2 years ago
3 0

4,20,100

  • First term=a=4

Common ratio

  • r=20/4=5

Now

explicit formula

  • a_n=ar^{n-1}
  • a_n=4(5)^{n-1}
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Answer:

Arc length is 12436.8m

Step-by-step explanation:

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Pamela is 7 years younger than Jiri. The sum of their ages is 39. What is Jiri ‘s age?
astraxan [27]

Based on the task given, Pamela's age and juri's age is 16 and 23 years respectively.

<h3>Equation</h3>

  • Juri's age = x
  • Pamela's age = x - 7
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x + (x - 7) = 39

x + x - 7 = 39

2x = 39 + 7

2x = 46

x = 46/2

x = 23

Therefore,

Juri's age = x

= 23 years

Pamela's age = x - 7

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= 16 years

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8 0
1 year ago
Mr. Ramadhan wants to save money to buy a house so he puts 21% of his earnings into his savings account. How much money does he
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He has 100% to start off. If he puts 21% into savings you subtract that from the starting amount. 100 - 21 = 79. Therefore the answer is 79%.

6 0
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HELP ASAP PLEASE WILL GIVE BRAINLIEST
Goshia [24]

Answer:

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Step-by-step explanation:

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