1.Is positive 2.Is negative 3.Is complex 4.cant be said
( a+ ib)*(C + id) = (ac-bd) + i(ad +bc) since it has iota term we can't say it as positive or negative , so product is always a complex number , it can be either purely real ( ad=-bc ) or purely imaginay ( ac = bd ) or may be having both real and imaginary parts , so it will definately a complex number
Three integers x, y, z such that 1 = < x, y ,z = < 9 and x not= y not=z are choosen. The sum of the products of number taken in pair is 73 and their sum is 16. If any of the three number is a perfect square , then what will be their product ?
In a sequence of eleven real numbers, only two are shown. The product of every 3 successive boxes is 120. Find the sum of all the numbers in the boxes (including the two already open).
_ _ (6) _ _ _ _ _ _ (-4) _
When a two digit number is multiplied by sum of its digits, the product is 715 but when the reverse of a two digit number is multiplied by sum of its digits the product obtained is 99 less. What is the sum of the digits of a number?
