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

Question

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

anonymous · Answer

All you need to do is to plug in both a and an and see which one is equal.

anonymous · Answer

yeah, but what is the equation?

mathstudent55 · Answer

12 - 4 = 8
28 - 12 = 16
60 - 28 = 32
Why are the third and fourth choices equal?

anonymous · Answer

You find which one is the right one by trying every equation till you get both sides equal.

mathstudent55 · Answer

Are some n's and (n-1)'s subscripts and exponents?

anonymous · Answer

I'm still a lot confused on what the heck to do...

anonymous · Answer

@mathstudent55  What do I subtract 60 by?

anonymous · Answer

Grr.. Im so confused!! :/

mathstudent55 · Answer

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

mathstudent55 · Answer

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.

mathstudent55 · Answer

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