Question

Am I right? Will medal!!!
Calculate the coefficient of y^13 in the expansion of (1-y)^31

Answer 1

Is it -403?

Answer 2

or 403

Answer 3

or -206,253,075

Answer 4

or 206,253,075

Answer 5

(1-y)^31
The 18th term is 31C18 (1)^18 (-y)^(31-18)
31C18 = 206 253 075
The 18th term is -206 253 075 y^13
The coefficient of y^13 is -206 253 075 <<<<<<<ANSWER!!!

Medal and Fan!! tx

Answer 6

Don't give her a Medal nor a Fan! She may have told you the correct answer but she stole it straight for here! All she did was copy and paste. http://webcache.googleusercontent.com/search?q=cache:kc8q8-pk41cJ:https://answers.yahoo.com/question/index%3Fqid%3D20130201071148AAEoiIK+Calculate+the+coefficient+of+y^13+in+the+expansion+of+%281-y%29^31&cd=2&hl=en&ct=clnk&gl=us