find three arithmetic means between 7 and 27
a. 5, 10, 5
b. 12, 17, 22
c. 12, 19, 26
d. 15, 19, 23

Question

find three arithmetic means between 7 and 27
a. 5, 10, 5
b. 12, 17, 22
c. 12, 19, 26
d. 15, 19, 23

the_fizicx99 · Answer

Ok, I tested the options to see which made most sense and if you subtract 12-7 it will give you 5,

So the difference is 5, by adding 5 + 7 = 12


12 + 5 = 17 

17 + 5 = 22

22 + 5 = 27

Get it, now you can plug in it into this formula to find any term you want.

f(n) = f(1) + d(n - 1)


----------------------------------------------------------------
f(6) = f(1) + 5(5- 1)
f(6) = 7 + 5(4)
f(6) = 7 + 20 = 27

See how that works?

the_fizicx99 · Answer

That's a typo my bad, it should be f(5) = f(1) + 5(5-1)

anonymous · Answer

thank you!

the_fizicx99 · Answer

np