Nehmen wir $ y = x^2 $: $ x \mid y $: wahr. $ y \mid x $? $ x^2 \mid x $ â $ x \mid 1 $ â $ |x| = 1 $.


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5Question: How many distinct 3-gene mutation combinations can be formed from a pool of 10 genes, where each combination consists of non-overlapping genes and order does not matter?
Question: A philosopher is organizing a roundtable discussion with 6 ethical theories, 3 of which are from the same school of thought. How many distinct seating arrangements are possible if the three related theories must sit together?
Solution: Treat the 3 related theories as a single block. This reduces the problem to arranging 4 entities (the block + 3 other theories) around a circular table, which has $(4-1)! = 6$ arrangements. The 3 related theories within the block can be permuted in $3! = 6$ ways. Total arrangements:
Question: A research foundation must distribute 7 identical grants to 5 distinct projects, ensuring each project receives at least one grant. How many valid allocation methods are there?
Solution: This is a classic stars and bars problem with the constraint that each project gets at least one grant. First, allocate 1 grant to each project, leaving $7 - 5 = 2$ grants to distribute freely. The number of non-negative integer solutions to $x_1 + x_2 + x_3 + x_4 + x_5 = 2$ is:
The population after 6 hours is approximately 354 bacteria (rounded to the nearest whole number).
A car travels at a constant speed of 60 miles per hour. How long will it take to travel 300 miles, and how much fuel will it consume if the efficiency is 25 miles per gallon?
It takes 5 hours and consumes 12 gallons of fuel.