What is the general relationship among the quantities e(x), e[x(x-1)], and v(x)?
a. e(x) = e[x(x-1)] + v(x)
b. e(x) = e[x(x-1)] - v(x)
c. e(x) = e[x(x-1)] * v(x)
d. e(x) = e[x(x-1)] / v(x)