please help! I'm dead confused

[fossil fog]

I am basically trying to understand what I did incorrectly for this recent pre calc exam.

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[boreal obsidian]

for 7b):

• the smaller number always goes on the left
• the graph extends higher than y=0

for g), it does not occur at x=5; also, give coordinates

h) and i) are wrong for the same reason and you'll need to find the local minimum first to correct those

i'm not sure what you did for k and l

[fossil fog]

ive been stuck on this one

wdym by extends higher

so is it (-5, inf) for the range?

[boreal obsidian]

there are sections of the graph above the line y=0

[boreal obsidian]

yes

[fossil fog]

local minimum is (0, -5), right?

because thats the lowest curve or dip

[boreal obsidian]

yes

[fossil fog]

i just looked at which x line they were in tbh

so if you see the parts on the left and right, at the end they cross the x ine for -10

which i assumed would be the case

[fossil fog]

is i (-infinity, -5)? and h (-5, to infinity)

[boreal obsidian]

no

you want the x coordinate of the turning point

[fossil fog]

so 0?

[boreal obsidian]

yes

because the graph will be decreasing when x is smaller than 0

[fossil fog]

so (-infinity, 0) and (0, infinity)

[fossil fog]

i see

[fossil fog]

am i correct here?

[boreal obsidian]

yes, for i and h

[fossil fog]

cool, thanks.

how do we do k and l?

[boreal obsidian]

use the solutions you found for j

[fossil fog]

thats where they intersect

[fossil fog]

so are we involving a union?

like (-infinity, -4) U (9, infinity)?

[boreal obsidian]

for k, yes

[fossil fog]

so are we using brackets for l?

[fossil fog]

cool

we have everything else under it so we can go from [-4, 9] right for f(x) <= g(x)? @boreal obsidian

[boreal obsidian]

we're using brackets for all of them, no?

[boreal obsidian]

yes

[fossil fog]

wait

[boreal obsidian]

did you mean [] these

[fossil fog]

all the numbers we found for 6 and 7 (besides infinite) has brackets right

[fossil fog]

yess

[boreal obsidian]

oh

[fossil fog]

like my notation right now is (-5, infinity)

[boreal obsidian]

i call () [] {} brackets interchangeably

[fossil fog]

i was asking if we were using brackets because of the sign: []

<=

[fossil fog]

kk, but im solid with parentheses, yes?

[boreal obsidian]

i think i misled you somewhere

hang on

[boreal obsidian]

[ for this since -5 exists

[boreal obsidian]

this one should be correct

[fossil fog]

k is good too?

ngl, i am sort of running out of time to get l, could you tell me just how to do it

i wont close the post or anything, i want to preface that im on a time crunch

[boreal obsidian]

it's just [-4, 9]

you've already stated this i believe

[fossil fog]

ok good

i was questioning myself there for a sec

i got a 74/100 on this test

[zealous helm]

my god, have i not answered this already?

[fossil fog]

no

[zealous helm]

...

i was in the process of helping

[fossil fog]

as i said, i was on a time crunch and you were not active

but its okay

thank you both

truly

i hope you guys have a good rest of your day, i actually appreciate this from the bottom of heart ❤️

thanks @boreal obsidian @zealous helm

[zealous helm]

okay

[agile delta]

@fossil fog has given 1 rep to @zealous helm @plucky oar

[fossil fog]

+close