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Question

a, b and c are in A.P. Show that: (b+ca),(c+ab) and (a+bc) are also in A.P.

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Solution

a,b,c are in A.P
2b=a+c2(c+ab)=2(2bb)=2b=(a+2b+cac)2(c+ab)=(b+ca)+(a+bc)
(b+ca),(c+ab),(a+bc) are in A.P

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