Consecutive sequences

[sidrasehar]

Hi,

I wanted to ask if there was a difference if I were to use 2n+1, 2n+3, 2n+5.. for consecutive odd sequence qns vs. x, x+2, x+4, x+6...

I realized that the latter sequence could have helped speed things up quite a bit for a qn I tried [Quant Review (2nd Ed), pg 70 qn 70], but as I was thinking of the former sequence 2n+1,... I took too long and made tons of careless mistakes.

Thanks!

[RonPurewal]

Those two approaches are essentially equivalent. If they are applied to the same problem, then the value of x will be the same as the value of 2n + 1.

Ideally, you should be able to use both of them. If one of them is awkward for whatever reason, you can just quit and switch to the other one.

[RonPurewal]

More generally, the answer to "Should I use this strategy, or that strategy?" is pretty much always "Both."