delgado1996
If f(x) = x + 2, find f(3).
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MathSofiya
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\[f(x)=x+2\]
\[f(3)=...+2\]
UnkleRhaukus
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\[f(x) = (x) + 2\]\[f(3) = (3) + 2\]
MathSofiya
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does it make sense?
delgado1996
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not really ?
MathSofiya
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\[x\] can be any number
and in this specific problem we want \[x\] to equal 3
MathSofiya
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what if x was 1
@delgado1996
what would you do then?
delgado1996
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is it 1
MathSofiya
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\[f(x)= x+2\]
\[f(3)= 3+2=5\]
\[f(2)= 2+2=4\]
\[f(1)= 1+2=3\]
UnkleRhaukus
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|dw:1341372312771:dw|
MathSofiya
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when the problem says
f(3)
it wants you to replace every x with the number 3
if the problem says f(2)
it wants you to replace every x with the number 2
delgado1996
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5
MathSofiya
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|dw:1341372556697:dw|
UnkleRhaukus
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x+2 =3+2
delgado1996
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6
delgado1996
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?
MathSofiya
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sorry I meant to write 3+2=5