2x+5x−x2x+5x-x2x+5x−x
2x+1≥02x+1\ge02x+1≥0
y−2y=2−4xy(0)=087y-2y=2-4xy\left(0\right)=087y−2y=2−4xy(0)=087
64z2−112z+4964z^2-112z+4964z2−112z+49
2.3x+2.8=−1.2x+9.82.3x+2.8=-1.2x+9.82.3x+2.8=−1.2x+9.8
3x+6≤273x+6\le273x+6≤27
limx→0(1−cos(x−1)(lnx)2)\lim_{x\to0}\left(\frac{1-\cos\left(x-1\right)}{\left(\ln x\right)^2}\right)x→0lim((lnx)21−cos(x−1))
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