anonymous
  • anonymous
If f(x) = x + 4 and g(x) = 2x - 3, find (g - f)(2).
Mathematics
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anonymous
  • anonymous
If f(x) = x + 4 and g(x) = 2x - 3, find (g - f)(2).
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
\( (g-f)(2) = g(2) - f(2)\) Can you do the next step?
anonymous
  • anonymous
No .. im sorry i really dont know this . @OneMathCat
anonymous
  • anonymous
\(g(x) = 2x - 3\) \(g(2) = 2\cdot 2 - 3\) Do you see the pattern?

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Hero
  • Hero
@ onemathcat, you have to be careful with the way you explain things. Let's assume the user understands everything you explain to her , but then she goes to school the next day, and even though She has the correct Answer and all the steps, the teacher proceeds to ask her, What is (g-f)(x)? With your limited explanation, she may not be able to answer the teacher's question.
anonymous
  • anonymous
this is an online class , she doesnt ask anything . Thank you for saying that though @Hero . I dont understand though ..
anonymous
  • anonymous
@Hero Hi ... I certainly wasn't intending to stop there! But, there was no one in sight ... evidently the user had gone offline. What is the recommendation at that point? Should you then type out the complete answer? I know the code of honor is certainly NOT just to give the answer...
Hero
  • Hero
Not every student here is taking online classes.
anonymous
  • anonymous
but i am , and i still dont understand ..
Hero
  • Hero
What gm trying to suggest here is to Compute (g-f)(x) first before computing (g-f)(2)
anonymous
  • anonymous
When you see \(g(x) = 2x - 3\), it's what is called "function notation". Think of it this way: g(blah) = 2(blah) - 3. So: g(1) = 2(1) - 3 g(2) = 2(2) - 3 g(10.7) = 2(10.7) - 3 Are you seeing the pattern?
anonymous
  • anonymous
where did 1 come from ?
anonymous
  • anonymous
and 2?
anonymous
  • anonymous
@Hero I'm happy to have you take over. No problem. Have a great day!
Hero
  • Hero
I don't want to takeover.
anonymous
  • anonymous
did someone get 2x+2 ??
anonymous
  • anonymous
Hero
  • Hero
Explain how you got 2x+2
anonymous
  • anonymous
2x-3 - 4x+4 which gave me x+1 and i multiplied that by 2
Hero
  • Hero
Somehow you've managed to confuse yourself
anonymous
  • anonymous
but thats what it said right

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