Mathematics
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OpenStudy (anonymous):
Can somebody PLEAAAAASSEE help me with this problem???
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OpenStudy (anonymous):
\[\sum_{m=1}^{5}(4m ^{2}+4)\]
OpenStudy (larseighner):
What do you get for the first term?
OpenStudy (anonymous):
I don't remember how to do this >_<
OpenStudy (larseighner):
What is the value of m in the first term?
OpenStudy (anonymous):
1
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OpenStudy (larseighner):
Okay plug that into the formula and what do you get?
OpenStudy (anonymous):
4(1)^2+4
4+4=8
OpenStudy (larseighner):
Okay that is the first term. Since this is a capital sigma question, what will you do with that when you get the next term?
OpenStudy (anonymous):
8+20+40+68+104+148=
OpenStudy (anonymous):
388
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OpenStudy (anonymous):
Is that the answer?
OpenStudy (larseighner):
One too many terms. From one to five is five items.
OpenStudy (anonymous):
but isn't that the sum equation?
OpenStudy (anonymous):
[4(1)^2+4]+[4(2)^2+4]+[4(3)^2+4]+[4(4)^2+4]+[4(5)^2+4]+[4(6)^2+4]= 8+20+40+68+104+148= 388
OpenStudy (larseighner):
Thr xum says from m=1 to m=5. That is 1, 2, 3, 4, 5 terms.
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OpenStudy (anonymous):
Oh ok. I see what you are saying
OpenStudy (anonymous):
What about this equation? \[5(18^{6x})=26\]
OpenStudy (anonymous):
Solve the equation. Round the answer to the nearest ten-thousandth.
OpenStudy (anonymous):
@LarsEighner