What is the 12th term of the geometric sequence -4, -12, -36
1 answer:
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Answer:
10
Step-by-step explanation:
let the number be n then half the number is n, then
n + n = 15
Multiply through by 2 to clear the fraction
2n + n = 30, that is
3n = 30 ( divide both sides by 3 )
n = 10
Thus the number is 10