shelby1290
  • shelby1290
Evaluate f(3) for each of the following: a) {(1,2), (2,0), (3,1), (4,2)} b) {(1,2), (2,3), (3,4), (4,5)} c) {(1,3), (2,5), (3,2), (4,0)}
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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Nnesha
  • Nnesha
evaluate what ?
shelby1290
  • shelby1290
@Nnesha I'm supposed to get an answer. At the back of my textbook the answers are: a) 1 b)4 c) 2
shelby1290
  • shelby1290
I just don't understand how they came to be and I must show my work.

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More answers

Bee_see
  • Bee_see
here, look at the x values that are 3. The Y values are 1,4, and 2
shelby1290
  • shelby1290
ohhhhhhhhhhhhh I see. That makes sense!
Bee_see
  • Bee_see
You normally have f(x),right? In this case, they replaced the x with 3. x=3.
shelby1290
  • shelby1290
@Bee_see Mhm i get it. Wow that was pretty simple. Do you have time for another one? It's still related to notations but a bit more complicated....
Bee_see
  • Bee_see
OK. Let's see it.
shelby1290
  • shelby1290
Determine f(-2), f(0), f(2) and f(2x) for each function. a) f(x) = -3x^2 + 5 b) f(x) = 4x^2 -2x + 1
shelby1290
  • shelby1290
Do i just plug them in for x
Bee_see
  • Bee_see
Yes!
Bee_see
  • Bee_see
|dw:1442287125606:dw|
shelby1290
  • shelby1290
|dw:1442287326562:dw|
shelby1290
  • shelby1290
Like that? ^
Bee_see
  • Bee_see
everything is right except for the last one. It's f(2x), right?
shelby1290
  • shelby1290
yes...
shelby1290
  • shelby1290
Is it -7x instead?
Bee_see
  • Bee_see
|dw:1442287483547:dw|
Bee_see
  • Bee_see
do you understand? When you are multiplying variables with exponents, you are going to add them so...(2)(2)=4 and (x)(x)= x^1+1=x^2
shelby1290
  • shelby1290
Oh okay and yes, i understand that
Bee_see
  • Bee_see
great. can you do part b? I can check the answers if you want me to.
shelby1290
  • shelby1290
the same thing goes for part b as well, right?
Bee_see
  • Bee_see
right
shelby1290
  • shelby1290
alright sounds good
shelby1290
  • shelby1290
1 Attachment
shelby1290
  • shelby1290
@Bee_see My wifi started to lag so I took a screenshot of the draw section thing lol
shelby1290
  • shelby1290
Am I correct though?
Bee_see
  • Bee_see
yes. everything
shelby1290
  • shelby1290
haha that's great! thanks for the help :)
Bee_see
  • Bee_see
no problem

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