Thread: Function Expression

Hi, I just want to make sure that I have the correct answer.
(a) 5
(b) 5
(c) 5
(d) 3
(e) 3
(f) 3

Originally Posted by miss.strw

Hi, I just want to make sure that I have the correct answer.
(a) 5
(b) 5
(c) 5
(d) 3
(e) 3
(f) 3

You have only one correct answer: (c).
The others are incorrect.
I will help you with d) $\displaystyle \lim _{x \to 2^ - } g(x) = - 1$

I hope the following graphic will help you.

Is it
a) 1
b) 1
c) 5
d) -1
e) -1
f) DNE

Is this correct???

Originally Posted by miss.strw

Is it
a) 1
b) 1
c) 5
d) -1
e) -1
f) DNE
Is this correct???

f) is incorrect, all others are correct.

The answer to f) is -1. WHY?

I dont know. and right now, I asked my friend n she say
it is suppose to be:

d) = -2
f) = DNE

Now I am confused. Am I right, or is she right?

My answer is now

d) -1
f) -1 (But I don't understand why it is -1)

Originally Posted by miss.strw

I dont know. and right now, I asked my friend n she say
it is suppose to be:

d) = -2
f) = DNE

Now I am confused. Am I right, or is she right?

My answer is now

d) -1
f) -1 (But I don't understand why it is -1)

There is no limit at $\displaystyle 2$. You can easily see in the graphic that the broken curves (the ones on the right and left hand sides of $\displaystyle 2$) does not become arbitrarily closer to each other at $\displaystyle 2$ (as it happens for $\displaystyle 1$).
I guess Plato made a typo, check your answer for d, it must be $\displaystyle -2$.



Check the lines above by following the color order: red, yellow, green, blue and pink, as the vertical lines approach to $\displaystyle 2$ from left, the horizontal lines approach to $\displaystyle -2$.

Originally Posted by Plato

f) is incorrect, all others are correct.

The answer to f) is -1. WHY?

Okay I got it thanks guys! Awesome forum! *thumbs up*

misread it.