请问1+x+2x+3x…99x+100x等于多少.
问题描述:
请问1+x+2x+3x…99x+100x等于多少.
答
1+x+2x+3x+……+99x+100x =1+x(1+2+3+……+99+100) =1+x(1+100)*100/2 =1+5050x
请问1+x+2x+3x…99x+100x等于多少.
1+x+2x+3x+……+99x+100x =1+x(1+2+3+……+99+100) =1+x(1+100)*100/2 =1+5050x