Find the required part of the geometric sequence.Find a formula for the nth term of a geometric sequence with second term -  and fifth term .

A. an =  (n - 1)
B. an =  (n - 1)
C. an = - 1
D. an = - 1


Answer: D

Mathematics

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Find the mean. If necessary, round to one decimal place.15, 10, 4, 9, 4, 4, 5

A. 8.5 B. 6.8 C. 8.8 D. 7.3

Mathematics

Evaluate the sum using the given information.x1 = -5, x2 = 4, x3 = 5, x4 = 3, and?x = 0.1; f(x) = x2

A. 7.5 B. 30 C. 1.1685 D. 5.7

Mathematics

Provide an appropriate response.The three-part inequality a < x ? b means "a is less than x and x is less than or equal to b". Which of these inequalities is not satisfied by any real number x? 

A. -8 < x ? -7 B. -2 < x ? 6 C. 0 < x ? 4 D. -5 < x ? -11

Mathematics

Find the zeros for the polynomial function and give the multiplicity for each zero. State whether the graph crosses the x-axis or touches the x-axis and turns around, at each zero.f(x) = 2(x2 + 1)5

A. -  , multiplicity 2, touches the x-axis and turns around; 
-1, multiplicity 5, crosses the x-axis
B. -  , multiplicity 2, touches the x-axis and turns around.
C. -  , multiplicity 2, crosses the x-axis.
D.  , multiplicity 2, touches the x-axis and turns around; 
1, multiplicity 5, crosses the x-axis

Mathematics