Determine the vertex of the graph of the quadratic function
a. 
b. 
c. 
d. 
e. 
b.
Mathematics
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Use implicit differentiation to find dy/dx and d2y/dx2.2y - x + xy = 7
A. 
= - 
; 
= 
B. 
= 
; 
= 
C. 
= 
; 
= 
D. 
= - 
; 
= 
Mathematics
Express the sum using summation notation. Use 1 as the lower limit of summation and i for the index of summation.a + ar + ar2 + . . . + ar11
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operations and simplify the result. Leave the answer in factored form.
+ 
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operation and express in lowest terms.
? 
A. - 
B. 
C. 
D. 
Mathematics