Practice problem
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What is ddx 1000x2+1\frac{d}{dx}\; \frac{1000}{x^2+1}dxdx2+11000
−2000x(x2+1)2-\frac{2000x}{(x^2+1)^2}−(x2+1)22000x
−2000xt2-\frac{2000x}{t^2}−t22000x
Type a concept, like “slope” or “photosynthesis”.
