Calculus
posted by Anonymous .
Wouldn't this sequence be neither geometric and neither arithmetic?
0.0005, 0.005, 0.05, 0.5
I can'f find a pattern.
And also this sequence, it doesnt look arithmetic or geometric
1/5, 1/4, 1/3, 1/2, 1,...
And also this other question:
The first three terms of the sequence defined by tn = 0.3n + 0.5 are
A. 0.5, 0.8, 1.1
B. 0.3, 0.2, 0.7
C. 0.2, 0.1, 0.4
D. 0.3, 0.8, 1.3
How would you do this, I did something with my calculator and got 0.4, so I just chose C as my answer, but how do you actually figure this out?

Calculus 
Reiny
The first one is GS , the value of r = 10
the 2nd is neither AS nor GS, but the terms can be described by the formula
term(n) = 1/(6n)
for the last,
let n=1 to get term(1) = .3(1) + .5 = 0.2
let n=2 to get term(2) = .3(2) + .5 = 0.1
etc.
what do you think?? 
Calculus 
Anonymous
Oh okay this makes sense. Thanks so much. So the third term would equal 0.4, when you plug in the three for the term number.
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