Studentc14
functions:
If f(x)=x^2x+1, solve:
1) f(x+1)
2) f(a)
3) 2f(x)2
4) f(2x)



This Question is Closed

Studentc14
Best Response
You've already chosen the best response.
0
CAN I post my answers and someone check it?

jaersyn
Best Response
You've already chosen the best response.
0
you mean "evaluate"?

Studentc14
Best Response
You've already chosen the best response.
0
probably, sorry

jaersyn
Best Response
You've already chosen the best response.
0
yeah, lol, just substitute whatever is in f(whatever is in here)

kmalone99
Best Response
You've already chosen the best response.
1
yes i'll check it

Studentc14
Best Response
You've already chosen the best response.
0
1) x^2+x+3
2) a^2+a+1 (i didn't know if there was any way to simplify this?
3) 2x^2x
4) 2x^22x+1

kmalone99
Best Response
You've already chosen the best response.
1
all wrong, it three right 2 f(x)2?

Studentc14
Best Response
You've already chosen the best response.
0
its 2*f(x) 2

Studentc14
Best Response
You've already chosen the best response.
0
can you show me how to do them then?

kmalone99
Best Response
You've already chosen the best response.
1
yes

kmalone99
Best Response
You've already chosen the best response.
1
jaersyn i got this

jaersyn
Best Response
You've already chosen the best response.
0
all yours kmalone99

jaersyn
Best Response
You've already chosen the best response.
0
<_<

kmalone99
Best Response
You've already chosen the best response.
1
\[1) f(x+1)= (x+1)^{2}(x+1)+1\]
\[=(x+1)(x+1)x1+1\]
\[=x ^{2}+2x+1x=x ^{2}+x+1\]

Studentc14
Best Response
You've already chosen the best response.
0
Ok, I get #1. I just didn't distribute the negative sign.

kmalone99
Best Response
You've already chosen the best response.
1
2) f(a)=\[f(a)=(a)^{2}(a)+1=a ^{2}+a+1\]

kmalone99
Best Response
You've already chosen the best response.
1
now retry 3 and 4

Studentc14
Best Response
You've already chosen the best response.
0
i got 2... i dont see what went wrong with 3 and i dont know how to simplify 4

Studentc14
Best Response
You've already chosen the best response.
0
wait 3 should be 2x^22x?

kmalone99
Best Response
You've already chosen the best response.
1
great now on four you just did not square the 2

Studentc14
Best Response
You've already chosen the best response.
0
oh! so it would be 4x^22x+1 ?

kmalone99
Best Response
You've already chosen the best response.
1
yes great job you get A+

Studentc14
Best Response
You've already chosen the best response.
0
yay! lol I just always make silly simplifying mistakes or I miss a sign or something simple like that. Oh well, thanks very much ^_^