what is the sum of all the coefficients in the expansion of (x+3y-z)^25?

2 ⤊

2006-11-16 15:14:27 · 3 answers · asked by M R 1 in Science & Mathematics ➔ Mathematics

25x+75y-25z
Sum of all coefficients
= 25+75-25
=75

2006-11-16 21:49:24 · answer #1 · answered by Muskaan 1 · 0⤊ 0⤋

Hmmmm... it seems like it would be 25! (factoral)

25 + 24 + 23 + 22 + 21 + .... + 1

2006-11-16 15:22:42 · answer #2 · answered by disposable_hero_too 6 · 0⤊ 0⤋

i think you should assign the values 1 for x,y and z( why?)
so it will be (4-1)^25 = 3^(25)

2006-11-16 16:05:00 · answer #3 · answered by Theta40 7 · 2⤊ 0⤋