i'm looking at this problem online, and i don't understand how they came up with the answer. Visual Calculus - Series - 12 so when they add 1, how does (2n-1) turn into (2n+1)? wouldn't the -1 and +1 cancel out, and it'd just be 2n?
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Originally Posted by isuckatcalc i'm looking at this problem online, and i don't understand how they came up with the answer. Visual Calculus - Series - 12 so when they add 1, how does (2n-1) turn into (2n+1)? wouldn't the -1 and +1 cancel out, and it'd just be 2n? no, you replace n with (n + 1), so 2n - 1 ---> 2(n + 1) - 1 = 2n + 2 - 1 = 2n + 1 note that things should be in absolute values
Which problem in that exercise are you referring to?
sorry, i thought i linked directly to it. i meant the third one down the list. thanks jhevon, that makes much more sense.
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