Sum of an infinite geometric sequence with the common ratio r, and the first term a1 is
we notice
-2 times -1/4=1/2,
1/2 times -1/4=-1/8
so a1=-2
r=-1/4 or -0.25
so the sum is
=
=
=
=
the sum is -8/5 or -1.6
If <em>x</em> is the smallest of the three, then the next two integers are <em>x</em> + 2 and <em>x</em> + 4.
"Twice the largest is 20 less than the sum of all three" translates to
2 (<em>x</em> + 4) = (<em>x</em> + (<em>x</em> + 4) + (<em>x</em> + 6)) - 20
Solve for <em>x</em> :
2<em>x</em> + 8 = 3<em>x</em> - 10
<em>x</em> = 18
Then the three numbers are {18, 20, 22}.
Hey there
I 've already answered this question twice
by mistake.Kindly check.
Answer:
a .8
b .03
c .125
d 125.0
Step-by-step explanation:
The starting percent is 100%. After one hour, bacteria tripled, so it is 300%.
