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10 cards from this deck
Cutting off digits without rounding up
5.685.685.68
0.004570.004570.00457
f(x)≈f(a)+f′(a)(x−a)f(x) \approx f(a) + f'(a)(x - a)f(x)≈f(a)+f′(a)(x−a)
Tangent line at a point on curve
(1+x)n≈1+nx(1 + x)^n \approx 1 + nx(1+x)n≈1+nx
When xxx is small
Expansion into infinite sum of terms from derivatives
ex≈1+x+x22!e^x \approx 1 + x + \frac{x^2}{2!}ex≈1+x+2!x2
5.675.675.67
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