回答:
#( - 5 + x)^ 5 = -3125 + 3125x -1250x ^ 2 + 250x ^ 3-25x ^ 4 + x ^ 5#
説明:
#(a + bx)^ n = sum_(r = 0)^ n((n)、(r))a ^(nr)(bx)^ r = sum_(r = 0)^ n(n!)/ (r!(nr)!)a ^(nr)(bx)^ r#
#( - 5 + x)^ 5 = sum_(r = 0)^ 5(5!)/(r!(5-r)!)( - 5)^(5-r)x ^ r#
#( - 5 + x)^ 5 =(5!)/(0!(5-0)!)( - 5)^(5-0)x ^ 0 +(5!)/(1!(5- 1)!)( - 5)^(5-1)x ^ 1 +(5!)/(2!(5-2)!)( - 5)^(5-2)x ^ 2 +(5!) )/(3!(5-3)!)( - 5)^(5-3)x ^ 3 +(5!)/(4!(5-4)!)( - 5)^(5-4 )x ^ 4 +(5!)/(5!(5-5)!)( - 5)^(5-5)x ^ 5#
#( - 5 + x)^ 5 =(5!)/(0!5!)( - 5)^ 5 +(5!)/(1!4!)( - 5)^ 4x +(5!)/ (2!3!)( - 5)^ 3x ^ 2 +(5!)/(3!2!)( - 5)^ 2x ^ 3 +(5!)/(4!1!)( - 5) x ^ 4 +(5!)/(5!0!)x ^ 5#
#( - 5 + x)^ 5 =( - 5)^ 5 + 5(-5)^ 4x + 10(-5)^ 3x ^ 2 + 10(-5)^ 2x ^ 3 + 5(-5) x ^ 4 + x ^ 5#
#( - 5 + x)^ 5 = -3125 + 3125x -1250x ^ 2 + 250x ^ 3-25x ^ 4 + x ^ 5#