Question

Help solve please. Write the sum using summation notation, assuming the suggested pattern continues.1 - 3 + 9 - 27 + ...

Answer 1

i think this is correct

Answer 2

\[\sum_{n=0}^{\infty} (-3)^{n}\]

Answer 3

\[\sum_{n=0}^{\infty}1(-3)^{n}\]

Answer 4

that 1 is irrelevant because \[1*n=n\]

Answer 5

okay thanks