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求助模考题!

1。For every positive even integers n , the function h(n) is defined to be the product of all even integers from 2 to n inclusive .I f p is the smallest prime factor of h(100)+1, then p is greater than 40.(请教思路)

2。A student worked for 20 days .For each of the amounts shown in the first row of the table , the second row gives the number of days that the students earned that amount.What is the median amount of money that the student earned per day for the 20 days .

Amount earned per day : $96 $84 $80 $70 $48

Number of days : 4 7 4 3 2(请教思路)

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H(100)&h(100)+1是互质的,所以不可能拥有除1外的共同factor,所以h(100)的所有因子都不可能是h(100)+1的因子,而2到50都是h(100)的因子,所以h(100)+1的因子必然大于50.

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