I have trouble with figure out this can anyone help Evaluating a Limit 2014A Mul
ID: 2839505 • Letter: I
Question
I have trouble with figure out this can anyone help
Evaluating a Limit 2014A Multiple Choice
Evaluate the limit as x approaches -4 for the function y = 3x+1
-11
13
Does not Exist
-9
Evaluate the limit as x approaches -7 for the function Y = ( x^2-49)/(x+7)
-14
0
7
-7
Evaluate the limit as x approaches 7 for the function Y = ( x^2-49)/(x+7)
-14
0
7
-7
Evaluate the limit as x approaches 0 for the function Y = ( x^2+49)/(x+7)
-14
7
-7
0
Evaluate the limit as x approaches 7 for the function Y = ( x^2+49)/(x+7)
-14
-7
7
0
Explanation / Answer
1) lim x-> -4 3x+1
= 3*(-4) +1
= -12+1
= -11
2)x approaches -7 for the function Y = ( x^2-49)/(x+7)
0/0 form
apply L hospital rule
lim x-> -7 2x/1 = 2* -7 = -14
3) x approaches 7 for the function Y = ( x^2-49)/(x+7)
= 0/14 =0
4) x approaches 0 for the function Y = ( x^2+49)/(x+7)
= 49/7 =7
5) x approaches 7 for the function Y = ( x^2+49)/(x+7)
= (49+49)/(7+7)
=98/14
= 7