Question

find t12 for a geometric sequence where t1=2+2i and r=3

Answer 1

did you say \(\Large t_1 = 2+2i?\)

Answer 2

\(\large {
a_{\color{brown}{ n}}=a_1\cdot r^{{\color{brown}{ n}}-1}\qquad \qquad
\begin{cases}
a_1\to first\ term\\
r=common\ ratio
\end{cases}}\)

Answer 3

thus \(\large {
a_{\color{brown}{ 12}}=a_1\cdot r^{{\color{brown}{ 12}}-1}\qquad \qquad
\begin{cases}
a_1\to &first\ term\\
r\to &common\ ratio
\end{cases}
}\)

Answer 4

Unfortunately, your presentation of this problem is hard to follow.

"find t12 for a geometric sequence where t1=2+2i and r=3"

What does the letter 't' represent here?

t1=2+2i does not register. Where did that come from?

Note that there is no addition or subtraction in a geometric sequence. So t1=2+2i could not be right.

Type in your question again. This time, please use real subscripts for subscripts: