Find the requested sum for the arithmetic sequence.a1 = 1, d = -4; S6
A. -54
B. -19
C. 6
D. -23
Answer: A
Mathematics
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Find the length of the indicated portion of the trajectory.r(t) = (4cos t)i + (4sin t)j + 3tk, 0 ? t ? ?/2
A. 
?
B. 
?
C. 
?
D. 
?
Mathematics
Use ?, ?, ?, or both ? and ? to make a true statement.{13, 14, 15} {13, 14, 15}
A. ? B. ? and ? C. ? D. ?
Mathematics
Determine i) the domain of the function, ii) the range of the function, iii) the domain of the inverse, and iv) the range of the inverse.f(x) = 
A. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
B. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
C. f(x): D = 
, R is all real numbers;
f-1(x): D is all real numbers, R = 
D. f(x): D = 
, R = 
;
f-1(x): D is all real numbers, R = 
Mathematics
Add or subtract as indicated.(17x + 6xy - 19y) - (9x - 24xy - 30y)
A. 8x - 30xy - 49y B. 49xy C. 8x + 30xy + 11y D. 11x - 8xy + 49
Mathematics