anonymous
  • anonymous
f(x)=-(x+3)(x-5) finding min and max x/y intercept
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
you're in calc too? lol
anonymous
  • anonymous
right i need help
anonymous
  • anonymous
i suck at calc lols i think u set both -x-3 and x-5 to zero and solve

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anonymous
  • anonymous
with calc you can find min/max using criticle point
anonymous
  • anonymous
how do i do that
anonymous
  • anonymous
to find criticel point , take derivative and set what you get to zero
anonymous
  • anonymous
can u write it out..
anonymous
  • anonymous
please
anonymous
  • anonymous
he means critical points
anonymous
  • anonymous
y=-(x+3)(x-5) let's use product rule to differentiate - (x+3)'(x-5)+(x-3)(x+5)'= - 1(x-5)+(x-3)
anonymous
  • anonymous
k
anonymous
  • anonymous
king explains it well here
anonymous
  • anonymous
idont udnerstand kings way. haha
anonymous
  • anonymous
can u actaully help me with all of number u on this attatched file
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anonymous
  • anonymous
i understood it :(
anonymous
  • anonymous
can u guys help me with wat i attached above i need help on number 6a-f
anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
what do you think is domain for 6) a) in other word is there any number that you can't put in for x?
anonymous
  • anonymous
anything above 6 ?
anonymous
  • anonymous
why not anything below 6 into f(x)=5+3x
anonymous
  • anonymous
i dont know
anonymous
  • anonymous
could it be anything
anonymous
  • anonymous
YES
anonymous
  • anonymous
why
anonymous
  • anonymous
you can put anything number and you won't get in problem so your domain is all real number
anonymous
  • anonymous
wwhat about range
anonymous
  • anonymous
domain is number you put in for x , range is number you get back as y as result of you putting value for x
anonymous
  • anonymous
if you can put all value for x, you will get any value of y so range is also all real number
anonymous
  • anonymous
ok now b
anonymous
  • anonymous
b is same thing
anonymous
  • anonymous
so is c
anonymous
  • anonymous
d) is different tell me what number can't we put in?
anonymous
  • anonymous
error
anonymous
  • anonymous
shows up
anonymous
  • anonymous
?
anonymous
  • anonymous
what do you mean?
anonymous
  • anonymous
in the calculator ..
anonymous
  • anonymous
for what number did you get an error?
anonymous
  • anonymous
-1 -2 -3 -4 and all negative
anonymous
  • anonymous
ok , so we can't put negative number in there , 0 is fine so domain is x must be greater or equal to 0 x>=0
anonymous
  • anonymous
how bout range
anonymous
  • anonymous
square root only return positive values sqrt[0]=0 sqrt[1]=1 sqrt[4]=2 ect....... so range is too y>=0
anonymous
  • anonymous
ok
anonymous
  • anonymous
alright, I forgot to do range for b and c
anonymous
  • anonymous
yeah
anonymous
  • anonymous
y= x^2 y of that function goes from 0 to infinity if we shift that up y=x^2+4 y goes from 4 to infinity
anonymous
  • anonymous
ok
anonymous
  • anonymous
for c) well just look the graph http://www.wolframalpha.com/input/?i=(1.5)%5Ex&t=crmtb01 goes from 0 to infinity
anonymous
  • anonymous
ok
anonymous
  • anonymous
alright.
anonymous
  • anonymous
i need e nd f
anonymous
  • anonymous
what do you think?
anonymous
  • anonymous
any number for domain
anonymous
  • anonymous
yes
anonymous
  • anonymous
range?
anonymous
  • anonymous
y=-x^2 goes from -negative infinity to 0 so y=-x^2+2 is shifted up by two
anonymous
  • anonymous
how about f
anonymous
  • anonymous
?
anonymous
  • anonymous
what numbers doesn't works?
anonymous
  • anonymous
any number below o
anonymous
  • anonymous
wait can u help me to explain number 5 i got the answers but idk how to explain the meaning
1 Attachment
anonymous
  • anonymous
no, only number that doesn't work is 0
anonymous
  • anonymous
how about range
anonymous
  • anonymous
all real number
anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
i need help explainging what 5 means a-d
anonymous
  • anonymous
make another thread

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