Tillbaka
A — 0803
1 p
Om
f
(
x
)
=
(
x
+
1
)
2
−
(
x
−
1
)
2
f(x) = \sqrt{(x+1)^2} - \sqrt{(x-1)^2}
f
(
x
)
=
(
x
+
1
)
2
−
(
x
−
1
)
2
, så gäller
A
f
(
x
)
=
2
f(x) = 2
f
(
x
)
=
2
B
f
(
x
)
=
2
x
f(x) = 2x
f
(
x
)
=
2
x
C
f
(
x
)
=
2
x
f(x) = 2\sqrt{x}
f
(
x
)
=
2
x
D
inget av (a)-(c).
Svara