Calculate 3339

A1 + a3 = 15
a1 + a2 + a3 = 21
Calculate a1 and q (quotient of the geometric sequence).

Correct answer:

a1 =  0
q =  2

Step-by-step explanation:

a+a q2 = 15 a + q a + a q2 = 21 a=3; q=2 a=12; q = 0.5 a1=3=0
q=2



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