Question

Waht is mean by product of its means and what is product of its extremes
What is the meaning of product of means and product of extremes

Answer 1

let there are four no in an ap

a,a+d,a+2d,a+3d

then a(a+3d) is known as the product of extremes

and

a+d(a+2d) is known as the product of means