Pixal
Pixal Pixal
  • 03-06-2020
  • Mathematics
contestada

If 5,x,y,40 are in geometrical progression, find x and y respectively.

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snog
snog snog
  • 03-06-2020

Answer:

x = 10, y = 20

Step-by-step explanation:

Because this is a geometric sequence, we'll call the rate of change z. Because 40 is 3 terms away from 5, we can write 5 * z * z * z = 5z³ = 40.

z³ = 8 → z = 2

Now, we simply multiply 5 by 2 to get x, which is 10, and then we multiply x by 2 to get 10 * 2 = 20 for y. Hope this helps!

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