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# induction watch

1. Can anyone explain why k(k+1) is turned into 2m?
2. (Original post by alesha98)
Can anyone explain why k(k+1) is turned into 2m?
what does the sentence to the right say? "Let k(k+ ... product of.... must be...."
3. (Original post by alesha98)
Can anyone explain why k(k+1) is turned into 2m?
k(k+1) is divisible by 2 for all k>=1 when k is an integer. So it can be expressed as 2m for some +ve integer m.
4. If k is a positive integer then k(k+1) is an odd number multiplied by an even number. This means that k(k+1) is always divisible by 2, hence the 2m. Of course this only applies if k is an integer.
5. Good job guys
6. thankyou so much , i get it now

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