limx→∞4−5x2\lim_{x\to\infty}4-5x^2x→∞lim4−5x2
4sin(x)=2sin(x)+24\sin\left(x\right)=2\sin\left(x\right)+\sqrt{2}4sin(x)=2sin(x)+2
x2−20x+7x^2-20x+7x2−20x+7
cot(x)csc(x)=−2cot(x)\cot\left(x\right)\csc\left(x\right)=-2\cot\left(x\right)cot(x)csc(x)=−2cot(x)
8x5−16x4−4x3+20x28x^5-16x^4-4x^3+20x^28x5−16x4−4x3+20x2
(−0.4−2)+1.3\left(-0.4-2\right)+1.3(−0.4−2)+1.3
limx→3(x2−27x2−9)\lim_{x\to3}\left(\frac{x^2-27}{x^2-9}\right)x→3lim(x2−9x2−27)
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