What is the sum of the geometric series in which a1 = 4, r = 2, and an = 512?

1 answer:

6 0

Geometric series is a series of numbers where the ratios of successive terms are the same. To answer this problem, the information that we need to know are the first first term, the number of terms and the ratio of any successive terms. First we get the number of terms by the equation:
an= a1(r)^(n-1) solve for n, which results to 8.
Then the sum is computed by the equation:
Sn = a1(((r)^n)-1)/(r-1))
The answer is then A 1,020

You might be interested in

F(x) = -6x-1 f(-1/2) = ?

UNO [17]

Answer:

Intersection point of this is (0,-0.5)

Step-by-step explanation:

Hope this helps :)

7 0

2 years ago

I need help I do not understand this it's due tomorrow

Goshia [24]

I'll help you out with 3 questions.
For #1, you kind of figured it out yourself
That 90 degree angle on paper means that m/1 and m/2 make up 90
If m1 is 50, then just subtract m1 (50) from 90, making it 40. m/2 is 40

If Angle M4 is 45 degrees then angle M3 is 180-45 since they both make up a 180 degree angle.

There are 180 degrees in a triangle
If m 8 = 78
and m 9 = 60
m 10 is 180 - 78 - 60

8 0

2 years ago

How do i factor a2-b2

bagirrra123 [75]