Question

S=81 +27 + 9 + 3 + ... ?​

Answer 1

Explicación paso a paso:

q=a2/a1

q=27/81=(27÷27)/(81÷27)=1/3

s∞=a1/(1-q)

s∞=81/(1-1/3)

s∞=81/(2/3)

s∞=243/2