Find the fifth term of an=(-1)^n/2n-1

a.-1/7 b.-1/9 c.1/9 d.1/7

b) -1/9

Step-by-step explanation:

Given

First term

second term

Third term

Fourth term

Fifth term

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation:

he is going to fill two shelves and the third shelf will only have five video games