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Answers for “10.5 是如何得出的?”

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The speaker verbally says "greatest common denominator," but the mathematical notation on the board is "gcd," which conventionally stands for "greatest common divisor." The context of dividing integers to find a common factor confirms that the intended concept is the greatest common divisor, and the spoken word is a verbal slip.

Conditions: The video discusses finding the common factor of two integers.; The board displays the notation gcd(a;b).; The procedure involves repeated integer division.

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It means that in the worst case, the algorithm's output cost is at most twice the true optimal cost.

Conditions: The problem is a minimization problem.; The algorithm is a 2-approximation.

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The probability density function (PDF) for a continuous uniform distribution on the interval [a, b] is a constant value given by the formula f(x)=1b−af(x) = \frac{1}{b - a}. The numerator 1 represents the total probability of 100%, while the denominator b−ab - a is the length of the interval, calculated as the upper bound minus the lower bound.

Conditions: The distribution is continuous and uniform.; The random variable is defined on the closed interval [a, b].; The lower bound a is strictly less than the upper bound b.

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The present value is $55,839.48. This is calculated by discounting the future value of 100,000back10yearsusingtheformula100,000 back 10 years using the formula PV = FV(1+r)n\frac{FV}{(1+r)^n},where, where r=0.06r = 0.06and and n=10n = 10$.

Conditions: The future value FV is $100,000.; The annual interest rate r is 6% (0.06).; The number of periods n is 10 years.; Compounding is annual.

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The value of the definite integral from 0 to 7 is 10.5. This is obtained by summing the signed areas of the three sub-intervals created by splitting at the breakpoints: 4.5, 6, and 0.

Conditions: The function is piecewise-linear.; The integration interval is from 0 to 7.; The graph consists of regions with signed areas 4.5, 6, and 0.