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Hatshy [7]
2 years ago
9

Arithmetic sequence, help with #18 plz

Mathematics
1 answer:
GREYUIT [131]2 years ago
6 0

Answer:

15th term is 29/4

Use Arithmetic equation

a1 = 1/4

d= common difference = 2/4

a15 = a1 + (n-1) d

a15 = 1/4 + (15 - 1) 2/4

a15 = 1/4 + 14 (2/4)

a15 = 1/4 + 7

a15 = 29/4 or 7 1/4

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y-intercept is computed (not found) by assigning x = 0 and computing y: here that is f(0) = Log(2*0 + 1) – 1 = Log(1) – 1 = 0 – 1 = -1 
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Assuming the Log cited is base 10, then 10^1 = 10^Log(2x + 1) = 2x + 1 

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Check this result in the original equation, I did! 

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I hope I helped! :)

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