Lesson # 29: y = aSin(x-p)+C

A - Amplitude     P.S. - Phase Shift     P - Period

2Cos(x+1)
- vertical stretch x2
- up 1 on the center l
- period = 1
- 1/4 period = 1/4

Lesson # 18: Infinite Sum & Sigma Sum

Infinite Sum:

Add the infinite sum of 6+2+2/3+.....

S =     6     
     (1-(-1/3))
   =      6    
         (2/3)
   = 6(3/2)
   =9

What is the formula:  S=   a   
                                       l-r

Sigma:

5

∑ 3i+2
i=1

5 - the terms
i =1  - input #
3i+2 - formula