Simplify.
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Find a formula for the nth partial sum of the series and use it to find the series' sum if the series converges.
+ 
+ 
+ ... + 
+ ...
A. 
; 9
B. 
; 
C. 
; 
D. 
; 9
Mathematics
Solve the system of equations by determinants.x + 4y = 116x + y = 4
A. x = - 
, y = 
B. x = - 
, y = - 
C. x = 
, y = - 
D. x = 
, y = 
Mathematics
Perform the indicated operation and simplify.
- 
A. 
B. 
C. - 
D. 
Mathematics
Solve the problem.Calculate the coordinates of the new location of the point (9, 9) when it is rotated 45° clockwise about the origin. Remember that it is the matrix 
that rotates a point 45° clockwise about the origin.
A. 
B. 
C. 
D. 
Mathematics