CHO XLIM A X 1 2017 12X 2018 2+ ; XLIM( X2 BX 1 X) 2→−∞→+∞ + + − = ....
Câu 28: Cho
x
lim a x 1 2017 12
x 2018 2+ ;x
lim(
x2
bx 1 x)
2→−∞
→+∞
+ + − = . Tính P 4a b= + .A. P 3= . B. P= −1. C. P 2= . D. P 1= .x
lim a x 1 2017 12
x 2018 2+ ;x
lim2
bx 1 x→−∞
→+∞
+ + − = . Tính P 4a b= + .A. P 3= . B. P= −1. C. P 2= . D. P 1= .