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noname [10]
3 years ago
11

Is 3, 1, 1/3, 1/9,... a geometric sequence?

Mathematics
1 answer:
barxatty [35]3 years ago
7 0
a_1;\ a_2;\ a_3;\ a_3;\ ...;\ a_n;\ a_{n+1};...\ is\ a\ geometric\ sequence\\if\ a_{n+1}:a_n=const.\\-------------------\\a_1=3;\ a_2=1;\ a_3=\dfrac{1}{3};\ a_4=\dfrac{1}{9}\\\\a_4:a_3=\dfrac{1}{9}:\dfrac{1}{3}=\dfrac{1}{9}\cdot\dfrac{3}{1}=\dfrac{1}{3}\\\\a_3:a_2=\dfrac{1}{3}:1=\dfrac{1}{3}\\\\a_2:a_1=1:3=\dfrac{1}{3}\\\\Answer:Yes.\ It's\ the\ geometric\ sequence.
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16. Find the values of x and y. (2y + 5) (5x - 17) (3x – 11)º
serg [7]

Answer:

x = 26

y = 9

Step-by-step explanation:

(5x - 17)° + (3x - 11)° = 180° (angles in a straight line)

Solve for x

5x - 17 + 3x - 11 = 180

Collect like terms

5x + 3x - 17 - 11 = 180

8x - 28 = 180

Add 28 to both sides

8x = 180 + 28

8x = 208

Divide both sides by 8

x = 208/8

x = 26

Also:

(2y + 5)° + 90° + (3x - 11)° = 180° (angles on a straight line)

Plug in the value of x and solve for y

2y + 5 + 90 + 3(26) - 11 = 180

2y + 5 + 90 + 78 - 11 = 180

Collect like terms

2y + 162 = 180

Subtract 162 from both sides

2y = 180 - 162

2y = 18

y = 9 (dividing both sides by 2)

6 0
3 years ago
P = 240 – 172<br>g=<br>9 x 8/-24<br><br>Work out the value of p×q​
mel-nik [20]

Step-by-step explanation:

I hope I got it right and I hope this helps

7 0
3 years ago
Please can someone explain and help me I am giving away 14 points the question is in the image
Tems11 [23]

Answer:

The area is 67.36 cm squared

Step-by-step explanation:

The height is 8.982. The base is 15. 8.982 * 15 = 134.73 / 2 = 67.36

5 0
2 years ago
Which ordered pair is a solution of y = x + 4?
TEA [102]

Answer:

Step-by-step explanation:

hello:

D. (9,13)​ because when x=9   so y=9+4 = 13.....(right)

5 0
3 years ago
Read 2 more answers
Mr. Dawson owns multiple fish breeding farms. The number of fish breeding farms is represented by the function f(x) = 5. The app
Ilya [14]
For this case what we must do is define h (x), which is given by:
 h (x) = f (x) * g (x)
 Where,
 f (x) = 5 (The number of fish breeding farms)
 g (x) = 80 (1.04) ^ x (The approximate number of fish per breeding farm)
 Substituting we have:
 h (x) = (5) * (80 (1.04) ^ x)
 Rewriting we have:
 h (x) = 400 (1.04) ^ x
 Answer:
 
the approximate population of the fish across all Mr. Dawson's farms after x months is:
 
h (x) = 400 (1.04) ^ x
7 0
3 years ago
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