Question

Plzzz answer....Ratio and proportion....Thnx

Answer 1

since , y is the mean proportional between x and z ,

then ,

x : y :: y : z

=> x/y = y/z

=> xz = y²

LHS = xyz(x+y+z)³

=> LHS = y(xz) (x+y+z)³

=> LHS = y(y)²(x+y+z)³

=> LHS = y³(x+y+z)³

=> LHS = [y(x+y+z)]³

=> LHS = (xy+y²+yz)³

=> LHS = (xy+yz+xz)³ (as , y² = xz)


=> RHS = (xy+yz+zx)³


since , LHS = RHS ,
proved


hope this helps

Answer 2

Answer:

Hey dear

Step-by-step explanation:

Here's your answer!!!!!!