Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.a1 = -
, d = 
A. an = n -
; a20 =
B. an = - n +
; a20 = -
C. an = - n +
; a20 = -
D. an = n -
; a20 =
Answer: A
You might also like to view...
Find the area of the specified region.Inside the circle r = -4 cos ? and outside the circle r = 2
A. (4? - 3
)
B. ?
C. (2? + 3
)
D. 2?
Solve the problem.The rabbit population in a forest area grows at the rate of 4% monthly. If there are 190 rabbits in July, find how many rabbits (rounded to the nearest whole number) should be expected by next July. Use .
A. 293 B. 319 C. 306 D. 246
Find an equation for the line with the given properties.Vertical line; containing the point (3, 9)
A. y = 9 B. y = 3 C. x = 9 D. x = 3
Add or subtract as indicated.Subtract (-8z2 - 2) from (3z2 + 2z - 5).
A. -5z2 + 4z - 5 B. 11z2 + 4z - 5 C. 11z2 + 2z - 3 D. -5z2 + 2z - 7