Math 7
Quiz # 4 Solutions
Section 11. Let f(x) = cfw_
, is f(x) continuous at x =2?
( )
No it is not continuous because
( ) f(2)
( )= ( )
( ) = 4(2) + 3 = 11
()
2. Prove using  definition of limit that
Given >0 and >/4,
<, then 


If 0 < 


Sectio
Math 7 Quiz 2 Solutions
Section 11.
2.
=
this is undefined therefore limit DNE
=
=
=4
1.
=
=
=6
2.
=
Section 2
=
This is undefined therefore limit DNE
Section 1Find the point (x,y) where the two lines intersect
y = 2x +1
y = kx 2
For what k do they intersect?
2x + 1 = kx 2
(move constants on one side and xs to the other)
2x kx = 3
(factor x)
x (2 k) = 3
(solve for x)
3
x = 2
Therefore k 2
y = 2x + 1
3
Name:
Section:
Math 7: Practice Final Exam
Please write neatly and clearly. On all problems, you must show your work and identify
your nal answer. Partial credit will be given. You may use a calculator. However, no cell phones or
books may be used.
1. Cal