Mathematics
8 Online
OpenStudy (anonymous):
Will fan and medal...
Identify the sequence graphed below and the average rate of change from n = 1 to n = 3.
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OpenStudy (anonymous):
The graph shows the points..
(2,8)
(3,4)
(4,2)
(5,1)
OpenStudy (anonymous):
OK.
I really don't know what they would want from you when they say "identify" the sequence, but
(x,y) --> (x+1,y/2)
is the pattern that I see.
OpenStudy (anonymous):
Yea, figured out the 1/2 part of the equation, but i need the entire equation and the average rate of change...
OpenStudy (dan815):
hey
OpenStudy (anonymous):
hey. can u help me?
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OpenStudy (dan815):
yes
OpenStudy (dan815):
so we are doing divisions by 2
OpenStudy (dan815):
y=8/2^(x-2)
OpenStudy (anonymous):
so 8 would be the a1 value???
OpenStudy (dan815):
that is the term 1 yah, what you mean by a1
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OpenStudy (dan815):
rate*
OpenStudy (dan815):
divided by 2* not 3
OpenStudy (anonymous):
im so confused. the options for the rate of change are 6 and -6
OpenStudy (dan815):
its (2-8)/2 =-6/2 = -3
OpenStudy (dan815):
hmm how do they get -6
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OpenStudy (dan815):
go with first choice
OpenStudy (anonymous):
ok thanks. do you think you can help with one more?
OpenStudy (dan815):
ok i will try
OpenStudy (dan815):
:)
OpenStudy (anonymous):
(cos Θ − cos Θ)^2 + (cos Θ + cos Θ)^2
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OpenStudy (dan815):
expand them and add them it will simplify
OpenStudy (dan815):
are you sure thats how it is
OpenStudy (dan815):
why arent they just subtracting the left side its 0^2
OpenStudy (dan815):
and you have 4cos^2(theta)
OpenStudy (anonymous):
thank you :)
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OpenStudy (dan815):
you're welcome see ya later!