In Try This 2 you may have found that each row of Pascal’s Triangle can be determined by adding adjacent numbers in the preceding row.
You may have noticed some of the following patterns:
Although Pascal’s triangle has many interesting patterns, the pattern of the triangle’s construction is most important for this lesson.
The coefficients of the binomial (x + y)n can be determined using row n + 1 of Pascal’s triangle. To determine the expansion of (x + y)7, use row 7 + 1, or row 8, of the triangle to determine the coefficients. Watch Binomial Expansion with Pascal’s Triangle to see a complete description of how to expand (x + y)7.
Complete questions 1.a., 1.b, 4, 7.a., 7.b., 11.a., 11.b., and 14 on pages 542 and 543 of the textbook. Answer