Question

Find the sum of the first 7 terms of the
following sequence.

Round to the nearest
hundredth if necessary.

6,-10 ,50/3
Sum of a finite geometric series:

sn = a1-a1rn /1-r

Answer 1

Answer:

20078/243

Step-by-step explanation:

sn = a1-a1r^n/1-r

sn = a1 * 1-r^n/1-r

s7 = 6 * 1 - (-5/3)^7/1-(-5/3)

s7 = 6 * 10039/729

s7 = 6 * 10039/243*3

s7 = 2 * 10039/243

s7 = 20078/243