## anonymous one year ago How much drugs do my teachers do a day to come up with these math questions?

1. skullpatrol

At what level?

2. anonymous

Senior level

3. skullpatrol

High school?

4. anonymous

Yeah

5. skullpatrol

The source of their questions are from university calculus courses.

6. skullpatrol

They strip away the calculus and just show you the algebraic tricks, that's why it looks so weird.

7. anonymous

Care to teach me trig? lol

8. skullpatrol

Try the Khan Academy on YouTube, it is the best way pal :)

9. anonymous

I know, i clicked on that, but that hurts my brain xD

10. anonymous

well can you teach me Sigma notation if i give u a problem?

11. skullpatrol

I can try :-)

12. anonymous

Alright hold up leme find a question...

13. anonymous

$\sum_{1}^{3} (2j-1)$

14. skullpatrol

|dw:1441276201524:dw|

15. anonymous

would there be an answer? or is that just how it is?

16. skullpatrol

You can simplify the numerical expression.

17. anonymous

how so?

18. anonymous

just by going like 2(1) + 1 = 2 + 1 = 3?

19. skullpatrol

yes

20. anonymous

*Mind Blown* heres a medal lol

21. skullpatrol

22. anonymous

2(2) +1 = 4 + 1 = 5... 2(3) + 1 = 6 + 1 = 7

23. skullpatrol

24. anonymous

3 + 5 + 7 = 15

25. skullpatrol

|dw:1441276635025:dw|

26. anonymous

I did 2j + 1 tho not - 1

27. skullpatrol

Just remember that "sigma" means "add up" the terms from the bottom index to the top.

28. skullpatrol

|dw:1441276894980:dw|

29. anonymous

That looks like a p3n15 i aint even gonna lie, sorry for the late messages, im helping someone too haha