Use Pascal's triangles to answer the questions below about by binomial expansion and nCr.How many terms are in the expansion of (a+b)^15? （ ）A. 11B. 13C. 14D. 15E. 16
Added by Cynthia H.
Step 1
We can see that the 15th row of Pascal's triangle is: 1 15 105 455 1365 3003 5005 6435 6435 5005 3003 1365 455 105 15 1 Each number in this row represents the coefficient of the corresponding term in the expansion of (a+b)^15. For example, the Show more…
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