Find the value of the function.f(x) = 
;
f(-9)
A. - 
B. 
C. 
D. 
Answer: D
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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.5 + 
+ 
+ ... + 
+ ...
A. 
; 
B. 
; 
C. 
; 
D. 
; 
Find the probability of the event.Give the probability that the roll of a die will show 4 or 6.
A. 1
B. 2
C. 
D. 
Determine whether the lines through each pair of points are parallel, perpendicular, or neither.(8, -4) and (28, -16); (-16, -10) and (-10, 0)
A. neither B. parallel C. perpendicular
Evaluate the function for the indicated input and interpret the result.A(10, 26) where A(x, y) = 
. (A computes the average of two numbers x and y.)
A. A(10, 26) = 31 The average of two numbers 5 and 13 is 31. B. A(10, 26) = 36 The average of two numbers 10 and 26 is 36. C. A(10, 26) = 36 The average of 36 is the two numbers 10 and 26. D. A(10, 26) = 18 The average of two numbers 10 and 26 is 18.