Solve the system of equations algebraically for real values of x and y.
?
?
A. 
, 
B. 
, 
C. 
, 
D. 
, 
E. no solution
Answer: C
Mathematics
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Express the sum using summation notation. Use 1 as the lower limit of summation and i for the index of summation.
+ 
+ 
+ . . . + 
A. 
B. 
C. 
D. 
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