How do you find nth term rule for r=-2 and a_1=6?

Jul 18, 2016

${T}_{n} = 6 \times - {2}^{n - 1}$
In a GP, the general term is ${T}_{n} = a {r}^{n - 1}$
${T}_{n} = 6 \times - {2}^{n - 1}$