Question

Use the limit theorem and the properties of limits to find the limit.

Answer 1

c. 3/8

Explanation:

Knowing that when x tends to -infinity, 1/x and 1/x^2 tends to 0, we have to divide both numerator and denominator by square of x ( because x^2, the major potency in the problem).

Now, we take limit and we have that:

lim x->inf
`(3   +5/x +3/x^2)/(8 -4/x +5/x^2)`

we have that the terms where we have x and x^2 tends to zero, so the limit tends to 3/8.

Answer 2

Option C is right

Explanation:

A function is given as

`h(x) = (3x^2+5x+3)/(8x^2-4x+5)`

Limit is to be found out for x tends to -infinity.

Since both are having even degrees when x tends to -infinity leading terms would turn positive.

We find that numerator and denominator has the same degree.

HEnce a horizontal asymptote exists

COefficients of leading terms are 3 and 8 respectively

Asymtote would be y =3/8

Alternate method:

When x tends to -infinity, 1/x tends to 0

`h(x) = (3+(5)/(x)+(3)/(x^2)  )/((8)/(x^2) -(4)/(x)+5 )`[/tex]

by dividing both numerator and denominator by square of x.

Now take limit as 1/x tends to 0

we get

limit is y tends to 3/8

Hence horizontal asymptote is y =3/8