Chapter Test
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Start by identifying the starting value and the common ratio of the geometric sequence.
a_1=25; a_n=a_(n-1) * 0.2
The starting value is a_1= 25 and the ratio between the consecutive terms is 0.2. Therefore, the common ratio of the sequence is r= 0.2. Let's use this information to write the recursive formula for our geometric sequence. General Form:& a_1= a; a_n=a_(n-1) * r Given sequence:& a_1= 25; a_n=a_(n-1) * 0.2