A PolyNoMials
Algebra
Level
2
f(x) is a 1000 degree polynomial such that
if f(x) = x if , when x is an integer
what is f(1001) (mod 10) ?
The answer is 1.
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
suppose f(x)= ax^1000+bx^999+cx^998+...+yx+z then f(1000)=a(1000^1000)+b(1000^999)+...+1000y+z f(1001)=a(1000+1)^1000+...+1000y+y+z f(1001)=a[10(...)+1]+...+y+z f(1001)(mod10)= a+b+c+...+y+z f(1001)(mod10)= (a+b+c+..+z)(mod10)=f(1)(mod10)=1(mod10)