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If $$a_1$$=2, $$a_2$$=3, $$a_n$$=$$a_{n-1}$$*$$a_{n-2}$$(n≥3),then $$a_8$$ is?
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What is the value of $$\frac{51!-50!}{50!-49!}$$?
Give your answer as a fraction.
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How many positive divisors of 210 can be expressed as a product of two prime factors?
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How many positive factors of 210 can be expressed as the product of two prime numbers?
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If the probability that event R will occur is 0.75, and the probability that event M will occur is 0.58, which of the following is equal to the maximum probability that both events will occur?
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