anonymous
  • anonymous
How much drugs do my teachers do a day to come up with these math questions?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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skullpatrol
  • skullpatrol
At what level?
anonymous
  • anonymous
Senior level
skullpatrol
  • skullpatrol
High school?

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

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