2024年4月8日发(作者：雅礼小升初2019数学试卷)

a>>b:a is much greater than b

a≥b: a is greater than or equal to b

x→∞：x approches infinity

x2:x square

x3:x cube

√￣x:the square root of x

3√￣x:the cube root of x

3‰：three peimill

n∑i=1xi:the summation of x where x goes from 1to n

n∏i=1xi:the product of x sub i where igoes from 1to n

∫ab:integral betweens a and b

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