Find all real numbers in the interval [0, 2?) that satisfy the equation.cos2x + 2 cos x + 1 = 0
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Evaluate the integral.
dt
A. 20
B. 4 ln 5
C. 
- 
D. 5
Mathematics
Find dy/dx without eliminating the parameter.x = ln(5t), y = e5t
A. 
B. te5t
C. 5te5t
D. 
Mathematics
Find the sum of the series as a function of x.
A. 
B. 
C. - 
D. - 
Mathematics
Determine whether the set is well defined or not well defined. The set of children in fifth grade at Maple Elementary School that are girls
A. well defined B. not well defined
Mathematics