(x + 1/x)² = 3 | √
<u>x + 1/x</u> = √3
According to short multiplication formula:
(a + b)³ =a³ + 3a²b + 3ab² + b³
x³ + 1/x³ = (x)³ + (1/x)³ = (x + 1/x)³ - 3x²/x - 3x/x² =
= (x + 1/x)³ - 3x - 3/x = (<u>x + 1/x</u>)³ - 3(<u>x + 1/x</u>) =
= (√3)³ - 3√3 = 3√3 - 3√3 = 0
If (x + 1/x)² = 3 the value of x³ + 1/x³ is 0.
16 x8 will be the new lenth!
Theirs a total of 60 customers divide it by 2 then times it by 5, you would get 150apples
His average is 4.2 seconds. hope it helps
