4.1 Find the linear approximation of
f
at
x=a
where (a)
f(x)=3-5x
x=-1
(b)
f(x)=3x-x^(2)
x=0
(c)
f(x)=\sqrt(x)+2
x=1
(d)
f(x)=x+(1)/(x)
x=-4