Use Pascal's triangle to answer the question.Guess a formula for the sum of the entries in the nth row of Pascal's triangle.
A. 2n + 1
B. 2n-1
C. 2n - 1
D. 2n
Answer: D
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Identrify the critical points and find the maximum and minimum value on the given interval I.f(x) = x2 + 18x + 81; I = [-18, 0]
A. Critical points: -18, -9, 0; maximum value 81; minimum value 0 B. Critical points: -9; maximum value 18; minimum value 0 C. Critical points: -18, 0, 81; minimum value 0 D. Critical points: -18, 0, 9; maximum value 81; minimum value 0
Decompose into partial fractions.
A. 
+ 
- 
+ 
+ 
B. 
+ 
+ 
+ 
+ 
C. 
+ 
+ 
+ 
+ 
D. 
+ 
+ 
+ 
+ 
For the complex number, state the real part, the imaginary part, and identify the number as real, pure imaginary, or nonreal complex.i
A. Real part: 0; Imaginary part: -
; Real
B. Real part: 0; Imaginary part: 
; Pure imaginary
C. Real part: 0; Imaginary part: 
; Real
D. Real part: 
; Imaginary part: 0; Real
Perform the indicated operations and simplify. Assume all variables represent positive real numbers.7 
- 3x 
A. 4x 
B. 7 
- 3x 
C. 4x 
D. 10 