1.

Find the arithmetic mean between (i) 14 and -6, (ii) (a-b) and (a+b)

Answer» (i) Arithmetic mean between 14 and -6
` ( 14 + (-6))/ 2 = 8/2 =4 `
(ii) Arithmetic mean between 9a-b) and ( a+b)
` ((a -b) + (a+b))/ 2 = (2a)/ 2=a `


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