Question

if 1/a , 1/b , 1/c are in A.P. prove that bc , ca , ab are in A.P​

Answer 1

Step-by-step explanation:

2/b=1/a+1/c

2/b=(a+c)/ac

2ac=b(a+c)

2ac=bc + ab

It satisfies condition for AP so it is AP

Answer 2

Hope it helps you ......

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