surryyy
  • surryyy
Determine the domain of the function f(x) = 2x - 4 when the range is {0, 12, 20}. {2, 8, 12} {0, 12, 20} {4, 16, 24} none of these
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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Nnesha
  • Nnesha
domain= x values range = y values
Nnesha
  • Nnesha
so substitute y for given set {0,12,20)one by one to find domain
Nnesha
  • Nnesha
how ?

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More answers

anonymous
  • anonymous
you need to solve for them and not guess
Nnesha
  • Nnesha
f(x) is same as y so \[\huge\rm y=2x-4\] start with first number 0 substitute x for 0 what do you get ?
Nnesha
  • Nnesha
\(\color{blue}{\text{Originally Posted by}}\) @Nnesha f(x) is same as y so \[\huge\rm y=2x-4\] start with first number 0 substitute x for 0 what do you get ? \(\color{blue}{\text{End of Quote}}\) i meant substitute y**8
anonymous
  • anonymous
no no no you do not substitute x for 0 you substitute f(x) to each the values in the range. you said it yourself y = f(x) range = y domain = x so, \(f(x) = 2x - 4 \) means solve for x for each of the following: \(0 = 2x-4 \) \(12 = 2x-4 \) \(20 = 2x-4 \)
anonymous
  • anonymous
if you do not know how to solve for x, then you have no business taking the course.
Nnesha
  • Nnesha
\(\color{blue}{\text{Originally Posted by}}\) @Nnesha \(\color{blue}{\text{Originally Posted by}}\) @Nnesha f(x) is same as y so \[\huge\rm y=2x-4\] start with first number 0 substitute x for 0 what do you get ? \(\color{blue}{\text{End of Quote}}\) i meant substitute y** \(\color{blue}{\text{End of Quote}}\) ^^^^^
surryyy
  • surryyy
x = 2 x=8 x=12
anonymous
  • anonymous
how did you GET those values? CAN YOU SHOW YOUR SOLUTION FOR EACH?
surryyy
  • surryyy
0=2x−4 2x−4+4=0+4 2x=4 2x/2 = 4/2 x=2
surryyy
  • surryyy
12=2x-4 2x−4+4=12+4 2x=16 2x/2 = 16/2 x=8
surryyy
  • surryyy
20=2x-4 2x−4+4=20+4 2x=24 2x/2 = 24/2 x=12
surryyy
  • surryyy
happy? fgt.
Nnesha
  • Nnesha
PERFECT! great job!! :=)
Nnesha
  • Nnesha
fgt????
surryyy
  • surryyy
ty Nnesha.
Nnesha
  • Nnesha
yw

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