- Thread starter eligotas
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How did you prove that (a+b+c) is greater than 6?We have a triangle with sides a, b, c that ab+bc+ca=12

Prove that 6=<a+b+c<7

I proved that a+b+c is no less than 6 but how to prove that it's less than 7?

Please share your work - indicating exactly where you are stuck.

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We have a triangle with sides a, b, c that ab+bc+ca=12

Prove that 6=<a+b+c<7

I proved that a+b+c is no less than 6 but how to prove that it's less than 7?

TO eligotas, If you will answer Prof Khan's question then I will show why the upper bound.How did you prove that (a+b+c) is greater than 6?

Please share your work - indicating exactly where you are stuck.