If f(x)=x100100+x9999+x9898+⋯+x22+x+1, then f′(1)=
100
10
1
0
f′(x)=x99+x98+x97+⋯+1∴f′(1)=100
If the function f(x) defined by f(x)=x100100+x9999+⋯+x22+x+1,then f′(0)=