marissa946 marissa946
  • 04-05-2020
  • Mathematics
contestada

The common ratio of a geometric series is 1/4 and the sum of the first 4 terms is 170. what is the first term of the series?

Respuesta :

MathPhys
MathPhys MathPhys
  • 04-05-2020

Answer:

128

Step-by-step explanation:

The sum of the first n terms of a geometric sequence is:

S = a₁ (1 − r^n) / (1 − r)

170 = a₁ (1 − ¼^4) / (1 − ¼)

a₁ = 128

Answer Link

Otras preguntas

How did Ruth and Naomi set an example for other Hebrews
What is decrease £20 by 15%
find the x-intercept of the parabola with vertex (6,27) and y-intercept (0,-81)
The remainder when x^3 - 11x + 10 is divided by (x+3) is A 52 B 16 C 4 D -24 I was doing a past paper and came across this,I know one (long) way of
How to write 1.35 as a fraction in lowest form
the strongest evidence for evolution from a common ancestor is
A man in a photograph is 1.5 inches in height. If the man is 6 ft. tall, what is the scale.
9x-6=8 ??¿????c?????????????????????????????????????????
Foods that allow microorganisms to grow are called parasites True Or False
What are some possible benefits to a nomadic lifestyle, and what are some possible benefits of a town lifestyle?