Answer:
Step-by-step explanation:
line perpendicular to ax+by=c is
bx-ay=k, where k is a constant.
if it passes through (-1,2) then
b(-1)-a(2)=k
or k=b-2a
so reqd. eq . is bx-ay=b-2a
f
(
x
)
=
2
, means, whatever be the value of
, f(x)=2#.
∴
−
4
.
-8
