09/09/05 23:18:07
>>421
x = t^(1/p),
y = (1-t)^(1/p),
S(D) = ∫[0,1] y･dx
= (1/p)∫[0,1] (1-t)^(1/p) t^(1/p -1) dt
= (1/p)Ｂ(1 + 1/p, 1/p)
= (1/p)Γ(1 + 1/p)Γ(1/p)/Γ(1 + 2/p)
= Γ(1 + 1/p)^2 / Γ(1 + 2/p),
09/09/05 23:18:07
>>421
x = t^(1/p),
y = (1-t)^(1/p),
S(D) = ∫[0,1] y･dx
= (1/p)∫[0,1] (1-t)^(1/p) t^(1/p -1) dt
= (1/p)Ｂ(1 + 1/p, 1/p)
= (1/p)Γ(1 + 1/p)Γ(1/p)/Γ(1 + 2/p)
= Γ(1 + 1/p)^2 / Γ(1 + 2/p),