The triangls is made up of number.The first line is 1 The second line is 1 1 The third line isThe triangls is made up of number.The first line is 1 The second line is 1 1The third line is 1 2 1What is the third number in line 1994?1 3 3 11 4 6 4 11 5
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The triangls is made up of number.The first line is 1 The second line is 1 1 The third line is
The triangls is made up of number.The first line is 1
The second line is 1 1
The third line is 1 2 1
What is the third number in line 1994?1 3 3 1
1 4 6 4 1
1 5 10 10 5 1
.
二项式展开,一下子搞定
1993*1992/2
1994*1993*1992/2/3
二项式,第三项是“C3,1994”等于1994×1993×1992÷3÷2等于1319381944
The triangls is made up of number.The first line is 1 The second line is 1 1 The third line isThe triangls is made up of number.The first line is 1 The second line is 1 1The third line is 1 2 1What is the third number in line 1994?1 3 3 11 4 6 4 11 5
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