Question

The sum of (4n) terms of the series, 1 + 2i - 4 - 8i + 16 + 321 - 64 ....., is

Answer 1

Answer:

see below.....

Step-by-step explanation:

1 + 2i - 4 - 8i + 16 + 321 - 64.......

= ( 1 - 4 + 16 - 64 + ........ ) + i ( 2 - 8 + 32 - ......)

now.....both are Geometric sequence.....hence u can try with formula......