Joke Collection Website - Talk about mood - As shown in Figure 2- 1, cut the red line into two small squares with one side long on the way to the paper and reassemble it into a big square.
As shown in Figure 2- 1, cut the red line into two small squares with one side long on the way to the paper and reassemble it into a big square.
Answer? = 2, A is not an integer, 2 is the fraction of denominator, fraction! This is an irrational number.
Let a = n/m-n.m =1,then n = 2m. Because there is 2 on the right, n is even, and there is an even factor of 2 on the left. Because -n. M = 1, m is odd, and there is only one factor 2 on the right. Contradicted with "even factor 2 is on the left". Prove completion.
definition
In mathematics, irrational numbers are all real numbers of irrational numbers, which are numbers composed of the ratio (or fraction) of integers. When the length of two line segments is irrational, the line segments are also described as incomparable, that is, they cannot be "measured", that is, they have no length ("measured"). Common irrational numbers are: the ratio of circumference to diameter, Euler number e, golden ratio φ and so on.
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