If the 8th term in an arithmetic series is 39 and the 20th term - 33.
What is the common difference?
A. - 6
С. 5
B. 8
D. - 12
y<½x+4
x-2y≥6
$x^{2}$ -13x-30=0
(1+x+x^2+x^3+....)^-1
8+ x^4=56
$x^{2}$ -13x-30
4ab^2c^4 - 2a^2b^3b^2 + 6a^3b^4c
1+x+x^2+x^3+....
x-2y=8
x+y=
A. (0,1)
B. (-2,2)
C. (3,4)
D. (-2,4)
E. (-2,-4)
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