Question

If abc = 1, show that
1
1
1
1+a+b-1 1+b+c
1+b+c-1 1+C+ a-1
+
+
= 1​

Answer 1

do you mean this

If abc = 1, show that1111+a+b-1 1+b+c1+b+c-1 1+C+ a-1++= 1

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