Exercise: 16.3
1.
a.
Solution:
For x ≥ 0, f(x) = x + 2
Right hand limit at x = 0 is
=
x
For x < 0, f(x) = 4x + 2
Left hand limit at x = 0 is
= x
= x
So, x
b.
Solution:
For x ≥ 1, f(x) = 3x + 2
Right hand limit at x = 1 is
= x
For x < 1, f(x) = 2x.
Left hand limit at x = 1 is
= x
= x
So, x
c.
Solution:
For x > 2, f(x) = 5x + 2
Right hand limit at x = 2 is
= x
For x < 2, f(x) = 7x – 2
Left hand limit at x = 2 is
= x
= x
So, x
d.
Solution:
For x ≥ 2, f(x) = 3x + 1
Right hand limit at x = 2 is
= x
For x < 2, f(x) = 2x2 – 1
Left hand limit at x = 2 is
= x
= x
So, x
e.
Solution:
For x ≥ 1, f(x) = 2x + 1
Right hand limit at x = 1 is
= x
For x < 1, f(x) = 4x2 – 1.
Left hand limit at x = 1 is
= x
= x
So, x
f.
Solution:
For x ≥ 1, f(x) = 3x – 2
Right hand limit at x = 2 is
RHL = x
For x < 2, f(x) = 2x2 + 1
Left hand limit at x = 2 is
LHL = x
= x
So, x
2.
a.
LHL = h
= h
RHL = h
= h
LHL = RHL
So, x
b.
RHL = h
= h
LHL = h
LHL ≠ RHL
So, x