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数学很枯燥,看看要求和难度,一般人恐怕解起来很难、很难!不过,这并不影响我们的眼睛。看看,它们的造型多美!级数(一)观察这个美妙的几何级数。你能否说出作为外面正方形的一部分的红色三角形全部面积之和?
Mathematics is very boring. It is difficult and difficult for most people to understand the requirements and difficulty. However, this does not affect our eyes. Take a look and see how beautiful they are! Series (a) Observe this wonderful geometric progression. Can you name the sum of the total area of the red triangle that is part of the outer square?