English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

The array shows the first four rows of the triangle attributed to the French mathematician Blaise Pascal. Study the triangle and determine the entries in the tenth row.
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
"Algebra Problems One Step Beyond" by Reuben Schadler

2007-08-30 10:38:36 · 8 answers · asked by baonam02 2 in Science & Mathematics Mathematics

8 answers

1 5 10 10 5 1
1 6 15 20 15 6 1
1 7 22 35 35 22 7 1
1 8 29 57 70 57 29 8 1

2007-08-30 10:44:48 · answer #1 · answered by saberhilt 4 · 0 1

1
1 1
1 2 1
Every number is the addition of the number directly above it plus the number directly above and left of it. It always starts with 1 and you add 1 at the end

1 X1 X2 X3 1
1 X1+1 X2+X1 X3+X2 1+X3 1
......




1 3 3 1
1 4 6 4 1
1 5 10 10 5 1
1 6 15 20 15 6 1
1 7 21 35 35 21 7 1
1 8 28 56 70 56 28 8 1
1 9 36 84 126 126 84 36 9 1
1 10 45 120 210 252 210 120 45 10

2007-08-30 17:54:18 · answer #2 · answered by petep73 3 · 0 0

The pattern is (always keep the ones):
top row - 1,
second row- 1 1
third row - 1 2 1, because you add the two ones from row above it,
fourth row - 1 3 3 1 because 1 + 2 = 3, and, again, 1 + 2 = 3,
fifth row - 1 4 6 4 1, because 1+3=4, 3+3=6, and 1+3=4,
sixth - 1 5 10 10 5 1, because 1+4=5, 4+6=10, 6+4=10, and 4+1=5,
seventh - 1 6 15 20 15 6 1, because 1+5=6, 5+10=15, 10+10=20, 10+5=15, and 5+1=6,
and just to make sure you get it, the eighth is - 1 7 21 35 35 21 7 1, because 1+6=7, 6+15=21, 15+20=35, 20+15=35, 15+6=21, and 6+1=7.

Hope that helps, it's kind of confusing =]

2007-08-30 17:51:34 · answer #3 · answered by Anonymous · 0 1

1 0
1 1 0
1 2 1 0
1 3 3 1 0
1 4 6 4 1 0 0
1 5 10 10 5 1
1 6 15 20 15 6 1
1 7 21 35 35 21 7 1
1 8 28 56 70 56 28 8 1
1 9 36 84 126 126 84 36 9 1
....................
anyway, the second number of the next row is equal to the 1st number + the 2nd number of previous row, etc.....
hope this helps

2007-08-30 17:49:40 · answer #4 · answered by tiger 4 · 0 0

Just multiply each row by 11 to get the next row. 1=11^0 The tenth row would be 11^9

2007-08-30 17:46:41 · answer #5 · answered by asdf 3 · 0 0

You can see that each number is got by adding the number above it and the number to the left of that number.

2007-08-30 17:46:19 · answer #6 · answered by Gnomon 6 · 0 0

Up to line 16 on
http://en.wikipedia.org/wiki/Pascal_triangle

2007-08-30 17:46:32 · answer #7 · answered by Raymond 7 · 0 0

15101051

2007-08-30 17:45:13 · answer #8 · answered by michael k 1 · 0 1

fedest.com, questions and answers