If $U = {p, q, r, s, t, u, u}$ and $A^{'} = {q, s, t}$ , what is set $A$

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Solution

$U = {p, q, r, s, t, u} A^{'} = {q, s, t} A = U - A^{'} = {p, r, u}$

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p, q, r, s, t, u

p + q + r + s + t + u = 2005

(- 1)^{p} + (- 1)^{q} + (- 1)^{r} + (- 1)^{s} + (- 1)^{t} + (- 1)^{u} ?

p, q, r, s, t, u

p + q + r + s + t + u = 2005

(- 1)^{p} + (- 1)^{q} + (- 1)^{r} + (- 1)^{s} + (- 1)^{t} + (- 1)^{u} ?

A = {p, q, r, s}

B = {r, s, t, u}

A / B

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