11/01/31 11:50:11
似たような考えで
π = 6∫[0,1/2]dx/√(1-x^2)
≧ 6∫[0,1/2](1+x^2/2)dx
= 25/8 = 3.125
11/01/31 11:50:11
似たような考えで
π = 6∫[0,1/2]dx/√(1-x^2)
≧ 6∫[0,1/2](1+x^2/2)dx
= 25/8 = 3.125
11/01/31 11:50:11
似たような考えで
π = 6∫[0,1/2]dx/√(1-x^2)
≧ 6∫[0,1/2](1+x^2/2)dx
= 25/8 = 3.125