计算定积分∫上0下负1[(3x^4+3x^2+1)/(x^2+1)](ey)

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计算定积分∫上0下负1[(3x^4+3x^2+1)/(x^2+1)](ey)计算定积分∫上0下负1[(3x^4+3x^2+1)/(x^2+1)](ey)计算定积分∫上0下负1[(3x^4+3x^2+1

计算定积分∫上0下负1[(3x^4+3x^2+1)/(x^2+1)](ey)
计算定积分∫上0下负1[(3x^4+3x^2+1)/(x^2+1)](ey)

计算定积分∫上0下负1[(3x^4+3x^2+1)/(x^2+1)](ey)
∫[-1,0](3x^4+3x²+1)/(x²+1) dx
=∫[-1,0] [3x²+1/(x²+1)] dx
=3∫[-1,0]x²dx+∫[-1,0][1/(1+x²)]dx
=3(x³/3)[-1,0]+(arctanx)[-1,0]
=1+arcntan(0)-arctan(-1)
=1-(-π/4)
=1+π/4
≈1.785398163