*Problems Checked #'s 1 - 10A.* Need 10b. - the rest of packet checked*
I need serious help on this packet, because I kind of get it, but at the same time I don't really understand it. I answered some of the questions which need to be checked for correctness and the ones that I don't have answers for, I need help on those. *If you need to explain each problem, so I have a better idea of what they are talking about on the packet.*
*My Answers are in a PDF File, PDF File has not been updated, so answers may be off a little*
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OpenStudy (firejay5):
@jim_thompson5910 sorry about this, but I need your help again, we already checked the first page, we got the 2nd - 6th page left to check.
OpenStudy (firejay5):
@jim_thompson5910 I think 10b. is 1, because if I plug in 5 into f(-x) = f(-5) = 1
jimthompson5910 (jim_thompson5910):
10b is not 1
jimthompson5910 (jim_thompson5910):
where is the max on f(x)?
OpenStudy (firejay5):
isn't it at the coordinate point (5,5)
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jimthompson5910 (jim_thompson5910):
yes, so you just reflect it over the y axis to find the point where the max occurs on g(x)
OpenStudy (firejay5):
isn't it -5
jimthompson5910 (jim_thompson5910):
correct, the max on g(x) occurs at x = -5
OpenStudy (firejay5):
wow I am so stupid, I should've known that urrgggh
OpenStudy (firejay5):
10c. is reflection over y-axis
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jimthompson5910 (jim_thompson5910):
10c, yeah
OpenStudy (firejay5):
11a. I have doesn't exist as first answer and -3 and 11c. is reflection over x-axis
jimthompson5910 (jim_thompson5910):
why doesn't g(-2.5) exist?
OpenStudy (firejay5):
cause if you go over to -2.5, there is nothing at -2.5
jimthompson5910 (jim_thompson5910):
remember that g(x) = f(-x)
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OpenStudy (firejay5):
we are on 11. it's a different problem Let g(x) = -f(x)
jimthompson5910 (jim_thompson5910):
oh right
jimthompson5910 (jim_thompson5910):
then yeah, g(-2.5) doesn't exist
OpenStudy (firejay5):
-f(x) = 3 = -3 right
jimthompson5910 (jim_thompson5910):
11b is incorrect
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OpenStudy (firejay5):
is 11b. -2 still for the min.
jimthompson5910 (jim_thompson5910):
what's the max on f(x)?
OpenStudy (firejay5):
isn't it at 5,5
jimthompson5910 (jim_thompson5910):
so the max is y = 5
you're reflecting f(x) over the x axis to get g(x) = -f(x)
jimthompson5910 (jim_thompson5910):
what is the min of g(x) ?
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OpenStudy (firejay5):
-5
jimthompson5910 (jim_thompson5910):
yes
OpenStudy (firejay5):
what coordinate point would it be: (5,-5)
OpenStudy (firejay5):
right?
jimthompson5910 (jim_thompson5910):
that is correct
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OpenStudy (firejay5):
so it's still at 5, but it's going down 5 units
jimthompson5910 (jim_thompson5910):
yes, since everything is flipped over the x axis
OpenStudy (firejay5):
answer is 5, okay 11c. is reflection over x-axis, 12a-c. now
OpenStudy (firejay5):
@jim_thompson5910 answer is 5 for 11b., okay 11c. is reflection over x-axis, 12a-c. now
jimthompson5910 (jim_thompson5910):
no idk why, but you changed your answer 11b isn't 5
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jimthompson5910 (jim_thompson5910):
the min value is the y value that pops out of the function
where it occurs is the x value
OpenStudy (firejay5):
-5
jimthompson5910 (jim_thompson5910):
yes
OpenStudy (firejay5):
question 12 now
jimthompson5910 (jim_thompson5910):
what did you get
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OpenStudy (firejay5):
Does the graph on 12 all the points are shift up 2 units
jimthompson5910 (jim_thompson5910):
no
OpenStudy (firejay5):
cause I need to sketch g(x) and I want to do that first
jimthompson5910 (jim_thompson5910):
try plugging in various values of x and see what you get
plug them into f(2x)
OpenStudy (firejay5):
I put y = 2x in my graphing calculator
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jimthompson5910 (jim_thompson5910):
g(x) = f(2x)
if x = 0, then g(x) = ??
OpenStudy (firejay5):
0
jimthompson5910 (jim_thompson5910):
correct, so we know (0,0) is on g(x)
jimthompson5910 (jim_thompson5910):
g(x) = f(2x)
if x = 1, then g(x) = ??
OpenStudy (firejay5):
so each point on the f(x) will go up 2 over 1 for g(x)
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jimthompson5910 (jim_thompson5910):
try it for other x values as well
OpenStudy (firejay5):
I basically plotted the line for f(2x)
jimthompson5910 (jim_thompson5910):
f(2x) isn't a complete straight line though
OpenStudy (firejay5):
I know cause I place the 7 different parent functions from page 1