The blog for Mr. Arocena's classes. Recorded here are assignments, quizzes, tests, projects and the current scores for all teams competing for the Arocena Cup. Occasionally I'll post something else too (most likely pertaining to education)
"It's not that I'm so smart, it's just that I stay with problems longer." - Albert Einstein
Tuesday, May 10, 2011
Math 11 Assignment
Today's assignment: - Complete Exercises p. 259 #1-18
i figured it out but what i did was just look at the f(x) being zero then changed the sign for the X in the tables... lol would that work everytime? or is it the same thing you where saying? im confused...
No, remember that if you multiply all the k numbers they should multiply to the constant term (in question 8 all the k numbers in the factors should multiply to -8)
So list all the factors of -8, and those are the ones you test to see if they are factors or not.
hey how do you do number 3, and number 7?
ReplyDeletethanks :)
Sorry I didn't get back to you sooner.
ReplyDeleteFor number 3:
Remember what the Factor Theorem says.
For Number 7:
Again remember what the Factor Theorem says.
As a refresher. If x-k is a factor, then f(k)=0.
hey no problem :)
ReplyDeleteand okay ill try it and post again if i cant figure it out.
thanks :)
oops sorry i meant number 4 instead of number 7
ReplyDeleteFor #4 it looks slightly different from the others but it's really the same.
ReplyDeleteRemember that for x-k, f(k)=0 if x-k is a factor.
What isn't explicit is that k also happens to be the x value that makes x-k=0.
So by extension x=k and therefore if x-k is a factor then f(x)=f(k)=0.
Hope that makes sense.
i figured it out but what i did was just look at the f(x) being zero then changed the sign for the X in the tables... lol would that work everytime? or is it the same thing you where saying? im confused...
ReplyDeleteNo, what you did is the same as what I was trying to say.
ReplyDeleteGood job!
okay sweet thanks :)
ReplyDeleteand could you try and explain number 8 to me? do i have to make a f(x) chart, or can i tell just by looking at the equation?
No, remember that if you multiply all the k numbers they should multiply to the constant term (in question 8 all the k numbers in the factors should multiply to -8)
ReplyDeleteSo list all the factors of -8, and those are the ones you test to see if they are factors or not.