sgadi, what is the solution of this equation..
The product of two positive numbers is 16. Find the numbers if the sum is least.
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the answer is 4,4 ..... but I am not able to get the proof
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ok so you have two numbers x, y
x+ y = O BUT xy=16 where O is some number, and we want it to be a min
so you want to find an equation with one variable
since we know xy=16 so solve for x we get x = 16/y
then plug into the unknown we get 16/y+y = O
take the derivative and set equal to zero we get -16/y^2 + 1 = 0
solving for y you get y=+4, -4. since we are dealing with positive numbers, take y = 4. but then we need x. so you plug back into xy=16
4*x = 16 therefore x =4
yeah i forgot how to give a "proof"
dude if you dont understand i can explain again if you need me to