Answer: 3 + 7i
Step-by-step explanation:
Equation expanded: 12 + 5i - 9 + 2i // now simplfy
12 - 9 = 3
5i + 2i = 7i
// together, we get
3 + 7i
Answer:13.0
Step-by-step explanation:
Given:
The geometric sequence is:

To find:
The 9th term of the given geometric sequence.
Solution:
We have,

Here, the first term is:

The common ratio is:




The nth term of a geometric sequence is:

Where, a is the first term and r is the common ratio.
Substitute
to find the 9th term.




Therefore, the 9th term of the given geometric sequence is 5103.