The sum of the first 3 terms of a geometric series is 171 and the common ratio is 2/3. what is the first term?

81

Step-by-step explanation:

let the terms be a,ar,ar²

r=2/3

a+a(2/3)+a(2/3)²=171

multiply by 9

9a+6a+4a=171×9

19 a=171×9

a=(171×9)/(19)

a=9×9=81

The first term is 81

Step-by-step explanation:

The common ratio is 2/3.

Sum of first n terms in GP =

The sum of the first 3 terms of a geometric series is 171

n=3

Substitute the values in the formula:

Hence The first term is 81

step-by-step explanation:

this is not a question

d 600 because 15*10*2=300

300+300=600

step-by-step explanation: