Question-99584 Tinku Tara June 4, 2023 None 0 Comments FacebookTweetPin Question Number 99584 by DGmichael last updated on 21/Jun/20 Answered by Rasheed.Sindhi last updated on 22/Jun/20 Ifa≡b(modm)andP(x)isapolynomialwithintegercoficientsthenP(a)≡P(b)(modm)Now,LetP(x)=anxn+an−1xn−1+…+a1x+a0where0⩽ai⩽9As10≡1(mod9)Therefore,an.10n+an−1.10n−1+…a1.10+a0≡an.1n+an−1.1n−1+…+a1.1+a0(mod9)anan−1…a1a0≡an+an−1+…+a1+a0(mod9)Thatisanumberisdivisibleby9ifitssumofdigitsisdivisibleby9. Commented by DGmichael last updated on 23/Jun/20 thanks sir !�� Terms of Service Privacy Policy Contact: info@tinkutara.com FacebookTweetPin Post navigation Previous Previous post: Question-165119Next Next post: 2dy-dx-y-0-y-0-3- Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Save my name, email, and website in this browser for the next time I comment.