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limx→ 0(cosx−sinx−1)2x\lim x\to\:0\frac{\left(cosx-sinx-1\right)}{2x}limx→02x(cosx−sinx−1)
(3x2−4)4\left(3x^2-4\right)^4(3x2−4)4
3x2−2x−7=03x^2-2x-7=03x2−2x−7=0
∫xx2−x−12dx\int\frac{x}{x^2-x-12}dx∫x2−x−12xdx
4(2ab−4a+1)4\left(2ab-4a+1\right)4(2ab−4a+1)
x2+23x+120=0x^2+23x+120=0x2+23x+120=0
cos2(x)(1−cos2(x))=cos2(x)\cos^2\left(x\right)\left(1-\cos^2\left(x\right)\right)=\cos^2\left(x\right)cos2(x)(1−cos2(x))=cos2(x)
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