Question

SOMEONE PLEASE HELP ASAP

Answer 1

Try this solution:
0.2; 0.2*(-0.3); 0.2*(-0.3)*(-0.3); 0.2*(-0.3)*(-0.3)*(-0.3);... etc.
if the first term of this sequence is n=1, then only 'C' is the right answer: 
$a_n=0.2*(-0.3)^{n-1}.$

Answer 2

The explicit formula for a Geometric Series can be written as:

$a_{n}= a_{1}(r)^{n-1}$

Here, $a_{1}=$First Term = 0.2

r = Common Ratio = - 0.06/0.2 = -0.3

Using these value in above formula, we can write the explicit formula of the sequence as:$a_{n}=0.2(-0.3)^{n-1}$

So, option C gives the correct answer