Let a?, a?, a?, . . . , an, . . . be an arithmetic sequence with a? = 12 and a? = ??. Find S??.
A) –141
B) –140
C) –139
D) –138
B) –140
Mathematics
You might also like to view...
Use the figure below to answer the following question(s).
Vertex A is adjacent to
A. every other vertex. B. vertex D only. C. vertex B and vertex E only. D. vertex C and vertex D only. E. none of these
Mathematics
Solve the equation.2x + 9 = 3(x + 1)
A. 6 B. -12 C. 12 D. -6
Mathematics
Solve the equation.7k + 21 = 0
A. k = 3
B. k = 
C. k = 
D. k = 2
Mathematics
Write the equation in vertex form. Identify the vertex.y = x2 + 6x - 4
A. y = (x + 6)2 - 40; (-6, -40) B. y = (x + 3)2 - 13; (-13, -3) C. y = (x + 3)2 - 13; (-3, -13) D. y = (x + 6)2 - 40; (-40, -6)
Mathematics