1.lim √(x^2+2x)－x = x→∞ 2. sin(3x)*cos(2x) lim ──────── = x→∞ tan(6x) 3.a line pass through (0,0) is tangent to y=x^3+3x+1 上的(a,b) 求a 4. d x ─ (∫ √(t^2+1) dt ) = dx 1 5. d ─ (ln(ln(ln(secx)))) = dx ∞ 6.lim Σ (2i^2-1)/n^2 = n→∞ i=0 2i 2 b 7.lim sin((1+─)+1)─ 转成 ∫f(x)dx 求a,b,f(x) n→∞ n n a 8.∫(e^x)sinx dx = π ∞ 9.I(k)=∫sin(kx)dx 求Σ I(5^n) = 0 n=0 10.y=(x√(x-4))/π 对 X轴旋转的体积 由scuendless 跟 farrenhi 联手讨论出... tiesto1114补完第九题+美化 --

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