July 22, 2019, 11:33:56 am

AuthorTopic: Units 3/4 Cambridge 6K W.E 37  (Read 121 times) Tweet Share

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Prerna94

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Units 3/4 Cambridge 6K W.E 37
« on: April 25, 2019, 12:07:09 pm »
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Hello can anyone please explain W.E 37? I understand odd and even graphs but I don’t understand this example.
It’s notation is so different to W.E 35.

S_R_K

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Re: Units 3/4 Cambridge 6K W.E 37
« Reply #1 on: April 25, 2019, 12:22:53 pm »
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If n is even, then (–1)^n = 1. If n is odd, then (–1)^n = –1.

Compare WE35c to WE37a. What they are doing in WE37a is using the (–1)^n notation to avoid having to write out the solutions in two parts, like they have done in WE35c.