Question

B) is Cath The arithmetic mean between (a - b) and (a +b) ​

Answer 1

a

Explanation:

we are to find the arithmetic mean of
`a-b` and
`a+b`.

the formula for arithmetic mean is

`\frac{\text{sum of values}}{\text{number of values}}`.

here, we have the sum of values as
`a+b+a-b=2a` and the number of values as 2.

so, our arithmetic mean is
`(2a)/(2)=a`.