(2)∫S = 1/2×(8-x)×6
∴S= 1/2×(8-5)×6
S=9
(3) No, when: △OPA area is equal to 24, Y is equal to 8.
And x=0.
When the △OPA area is greater than 24, ∴ Y is greater than 8.
And x < 0.
X cannot be a negative number.
∴ cannot be greater than 24.
120 10 problem
parallel
1211/problem
( 1) 1、2、3
(2)2、3、4
(3) 1、2、3
(4) 1、2、4