Answer:
Step-by-step explanation:
(fx+cd)/(x-f)=1/2
Cross multiplication,
2*(fx + cd) = 1 * (x-f)
2fx + 2cd = x - f
2fx - x = -2cd - f
x (2f - 1) = -2cd -f
x = (-2cd-f )/ (2f-1)
Answer:
18
Step-by-step explanation:
<em>First, use the equation for geometric mean; an=a1r^n-1</em>
*where is an is the number at an n term, r is the ratio and a1 is the first number of the sequence.*
12 = a1 r^5
27 = a1r^7
From the equations above,
a1 = 128/81
r = 3/2
Therefore, the 7th term is:
an = (128/81) (3/2)^6
an = 18
hope this helps :)
Answer:
Step-by-step explanation:
