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HELP!! n an 1 4 2 12 3 28 4 60 Which recursive equation represents the pattern? an = an – 1 + 2n an = an – 1 + 2(n + 1) an = an – 1 + 2n + 1 an = an – 1 + 2n + 1

Mathematics
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All you need to do is to plug in both a and an and see which one is equal.
yeah, but what is the equation?
12 - 4 = 8 28 - 12 = 16 60 - 28 = 32 Why are the third and fourth choices equal?

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You find which one is the right one by trying every equation till you get both sides equal.
Are some n's and (n-1)'s subscripts and exponents?
I'm still a lot confused on what the heck to do...
@mathstudent55 What do I subtract 60 by?
Grr.. Im so confused!! :/
n an 1 4 2 12 4 + 8 4 + 2^3 3 28 12 + 16 12 + 2^4 4 60 28 + 32 28 + 2^5 Do you see a pattern? Each term, an, is obtained by adding the previous term to 2 to the power n + 1
The way you wrote the choices makes no sense. There must be some exponents and subscripts there. You wrote everything as if it were simple numbers.
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None of the choices you gave represent the recursive rule. Also, the third and fourth choices in your post are the same.
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oops, sorry about that. :/
Look at last choice. It's what I wrote. Look again at the pattern I wrote, and see how I arrived at choice #4

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