Question: Let x= (d_{k}d_{k-1}...d_{1}d_{0})_{10}
Prove that x is divisible by 11 if and only if the following alternating sum is divisible by 11.
d_{0}-d_{1}+d_{2}-d_{3}+...+(-1)^{k}d_{k }Any help is appreciated!
Question: Let x= (d_{k}d_{k-1}...d_{1}d_{0})_{10}
Prove that x is divisible by 11 if and only if the following alternating sum is divisible by 11.
d_{0}-d_{1}+d_{2}-d_{3}+...+(-1)^{k}d_{k }Any help is appreciated!