- #1

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1)Evaluate : lim as x approaches infinity for

(3x-4-4x^2) / (x^2 -16)

2)Evaluate: lim as x approaches -27 for

(27+x) / ( 7/2 + 3 )

thank u.

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- Thread starter kiss89
- Start date

- #1

- 13

- 0

1)Evaluate : lim as x approaches infinity for

(3x-4-4x^2) / (x^2 -16)

2)Evaluate: lim as x approaches -27 for

(27+x) / ( 7/2 + 3 )

thank u.

- #2

JasonRox

Homework Helper

Gold Member

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1)Evaluate : lim as x approaches infinity for

(3x-4-4x^2) / (x^2 -16)

2)Evaluate: lim as x approaches -27 for

(27+x) / ( 7/2 + 3 )

thank u.

If you show us some work, we will be glad to help you.

- #3

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Sorry about that.....heres my work

http://img88.imageshack.us/img88/9971/img002sy9.png [Broken]

http://img88.imageshack.us/img88/9971/img002sy9.png [Broken]

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- #4

- 492

- 1

1)Evaluate : lim as x approaches infinity for

(3x-4-4x^2) / (x^2 -16)

2)Evaluate: lim as x approaches -27 for

(27+x) / ( 7/2 + 3 )

thank u.

for #1, in order to find the limit as x approaches infinity you need to divide the numerator/denominator by the highest power of x in the denominator, in this problem it would be x^2.

Doing this you'd end up with some 1/x's or x^n times some constant (1,2,3,...) which =0 when you take their limit as x approaches infinity

for #2, lim as x approaches a for f(x) = f(a) IF a is in the domain of f

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- #5

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- #6

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what about Q.1 i still dont understand how to solve it using infinity???

- #7

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