수식 9: left parenthesis, "A" Subscript, 1 , Baseline plus "a" Subscript, 1 , Baseline "t" , "A" Subscript, 2 , Baseline plus "a" Subscript, 2 , Baseline "t" , right parenthesisA1+a1t,A2+a2t
00
정의역 t 최솟값:
less than or equal to "t" less than or equal to≤t≤
11
정의역 t 최댓값:
9
수식 10: "S" left parenthesis, "x" , "y" , right parenthesis greater than 0Sx,y>0