[理工] [離散]-求係數

[luckyburgess (心安即自在)]

題目:What is the cofficient of x^2 y^3 z^2 w^5 in the expression of
     (x+2y-3z+2w+5)^16 ?

不曉得該怎麼解,麻煩幫忙解一下感謝!!

--
※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 140.134.213.201