Question

Find the product of:
(3/4x*x一4/3y*y)(4/3x*x十3/4y*y
)
​

Answer 1

Answer:

a/b-b/a=x:y if (x-y)=(a/b+b/a)find x

→ a/b-b/a=x/y or (a²−b²)/ab =x/y

i.e. y = xab/(a²−b²) ....(i)

(x-y)=(a/b+b/a)

Since (x-y)=(a/b+b/a) =(a²+b²)/ab.....(ii)

Hence from (i)and (ii), we have

{x−xab/(a²−b²)}=(a²+b²)/ab

or x {(a²−b²)−ab} /(a²−b²)=(a²+b²)/ab

→ x = {(a²+b²)/ab}×[{(a²−b²)}/{a²−b²−ab} ]

→x= {(a^4−b^4)}/{(a²−b²−ab)(ab)}

Step-by-step explanation:

It is given that A={x,y,z} and B={1,2}

∴ A×B={(x,1),(x,2),(y,1),(y,2),(z,1),(z,2)}

Since n(A×B)=6

The number of subsets of A×B is 2

6

.