camboguy
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ok I am confused when x->negative infinity or positive infinity.
for example
lim (5x^3+27)/(20x^2 + 10x + 9)
x-> negative infinty
heres what i think, i want to know if i have the right idea or not.
- so since the top exponent is larger then the denominator the lim DNE and so i plugged in a negative value to test if it is negative or positive infinity so i put in -1 just to test, the thing is i only plunged it into the (5x^3)/(20x^2); I am thinking this is what i do, and then i get a negative value so i am assuming it is negative infinity. that is what the answer is so posed to be, but did i do it how its so posed to be done?
for example
lim (5x^3+27)/(20x^2 + 10x + 9)
x-> negative infinty
heres what i think, i want to know if i have the right idea or not.
- so since the top exponent is larger then the denominator the lim DNE and so i plugged in a negative value to test if it is negative or positive infinity so i put in -1 just to test, the thing is i only plunged it into the (5x^3)/(20x^2); I am thinking this is what i do, and then i get a negative value so i am assuming it is negative infinity. that is what the answer is so posed to be, but did i do it how its so posed to be done?