Express the sum using summation notation.
- 
+ 
- ... + (-1)(9 + 1) 
9
A. 
k
B. 
C. 
k
D. 
k
Answer: D
Mathematics
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Write as a radical expression. Simplify if possible.(-125)2/3
A. 
2 = 25
B. (-125)2/3 is not a real number.
C. 
2 = -25
D. 
2 = -5
Mathematics
Use sum-to-product identities to rewrite the expression as a product.cos 
- cos 
A. 2 sin 
cos 
B. 2 sin 
sin 
C. -2 sin 
sin 
D. -2 cos 
cos 
Mathematics
Solve the equation by the square root property. If possible, simplify radicals or rationalize denominators. Express imaginary solutions in the form 
2 = 
A. 
B. 
C. 
D. 
Mathematics
Let f(x) = x² - 18x + 75 and g(x) =  FIGURE 1.png)
Find  Figure 2.png)
What will be an ideal response?
Mathematics