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If an+2=an+an+1

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Source: — Data Sufficiency |
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by 4meonly » Fri Dec 05, 2008 6:19 am
n>=1), what is a6?

(1)a6-a5=3
(2)a7+a8=34

(1)
means that succesive term is 3 greater than preceding. It is difference between neighbouring terms
UNSUFF to find the value of a6

(2)
Sum of neighbouring terms
UNSUFF to find the value of a6

(1)(2)
a6 + 3 = a7
a6 + 3 + 3 = a8
2*a6 + 9 = 34

a6 can easily be found

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Junior | Next Rank: 30 Posts
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thanks

by mmgmat2008 » Fri Dec 05, 2008 4:49 pm
It is a new type of question, I get it now.

thanks.
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