Toán Lớp 6: cho a = 2+2^2+2^3+2^4+-..+2^60 chứng minh rằng a chia hết cho3 achia hết cho 7achia hêt cho 15

Question

Toán Lớp 6:  cho a = 2+2^2+2^3+2^4+......+2^60 chứng minh rằng a chia hết cho3 achia hết cho 7achia hêt cho 15

hoaiphuong85 · Answer

Giải đáp:    1529263   Lời giải và giải thích chi tiết:    2+2^2+2^3+2^4+...+2^60   =2+2.2+2.2.2+2.2.2.2+...+2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2=2+4+8+16+...+1529215+18=6+8+16+...+1529215+18=14+16+...+1529215+18=30+...+1529215+18=1529245+18=1529263   ch&uacute;c bn học tốt

buianhtuan · Answer

Lời giải và giải thích chi tiết:    2+2^2+2^3+2^4+...+2^60   =2+2.2+2.2.2+2.2.2.2+...+2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2   =2+4+8+16+...+1529215+18   =6+8+16+...+1529215+18   =14+16+...+1529215+18   =30+...+1529215+18   =1529245+18   =1529263   CHO MIK XIN CTLHN VOTE 5* V&Agrave; CẢM ƠN   CH&Uacute;C BN HỌC TỐT