1
以順
10
(B)
(ACE
設函數f(x)-
9
x + 1. 若x>1
2x + 3, x < 1
(B) f(1) = 5
則下列哪些選項是正確的? ?
(A) f(0) = 3
(C) lim f(x) = 1
(D) lim f(x) = 2
x →0.
x 1
(E) lim f(x) = 5
GO OZLLOW.
X2
17 : (A) x = 0 = f(x) = 2x + 3 = f(0) = 3
(B) x = 1 = f(x) = x2 + 1 = f(1) = 2
(C) lim f(x) = lim (2x + 3) = 3
(D)
X0
x=0
(D) lim (x2 + 1) = 2
X11
lim (2x + 3) = 5
x-1
. . lim f(x) + lim f(x) .. lim f(x) 7# #
x1
)
x →1-
x>1+
(E) x = z=f(x) = x2 + 1 = f(z) = 5
(I
11
上正確?