How much drugs do my teachers do a day to come up with these math questions?

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How much drugs do my teachers do a day to come up with these math questions?

Mathematics
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At what level?
Senior level
High school?

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Other answers:

Yeah
The source of their questions are from university calculus courses.
They strip away the calculus and just show you the algebraic tricks, that's why it looks so weird.
Care to teach me trig? lol
Try the Khan Academy on YouTube, it is the best way pal :)
I know, i clicked on that, but that hurts my brain xD
well can you teach me Sigma notation if i give u a problem?
I can try :-)
Alright hold up leme find a question...
\[\sum_{1}^{3} (2j-1)\]
|dw:1441276201524:dw|
would there be an answer? or is that just how it is?
You can simplify the numerical expression.
how so?
just by going like 2(1) + 1 = 2 + 1 = 3?
yes
*Mind Blown* heres a medal lol
what about the rest?
2(2) +1 = 4 + 1 = 5... 2(3) + 1 = 6 + 1 = 7
now add it up
3 + 5 + 7 = 15
|dw:1441276635025:dw|
I did 2j + 1 tho not - 1
Just remember that "sigma" means "add up" the terms from the bottom index to the top.
|dw:1441276894980:dw|
That looks like a p3n15 i aint even gonna lie, sorry for the late messages, im helping someone too haha

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