Question

If the 5th term of the geometric sequence is 162 and the ratio is 3, then the first term of the sequence is

Answer 1

Step-by-step explanation:

n = 5 , a5 = 162

a×r^(n-1) = an

a×(3)^(5-1) = 162

a ×(3)^4 = 162

81a = 162

a = 162/81

a = 2 is the first term

———————–

Answer 2

Answer:

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