Week 2-My Geometric Sequence

A geometric sequence is formed by multiplying each term after the 1st term by a constant, to determine the next term.

The constant is the common ratio, r , of any term after the first, to the preceding term.

My geometric sequence is 4, 12, 36, 108, 324,……

Part 1 : Find and .

Know- =4

Part 2: Find .