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\(313^5.229-313^6.36\)
\(=313^5\left(229-313.36\right)=313^5.\left(-11039\right)=-313^5.1577.7⋮7\)
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(3133.299 - 3136.36) = [3133.(299 - 36)] = 3133.263 = 8064710111 , mà 8064710111 : 7 = 1152101444 => (3133.299 - 3136.36) chia hết cho 7.
(3133.299 - 3136.36) = [3133.(299 - 36)] = 3133.263 = 8064710111 , mà 8064710111 : 7 = 1152101444 => (3133.299 - 3136.36) chia hết cho 7.
Mình ko chắc là đúng
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(3133.299 - 3136.36) = [3133.(299 - 36)] = 3133.263 = 8064710111 , mà 8064710111 : 7 = 1152101444 => (3133.299 - 3136.36) chia hết cho 7.
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- Ta có:
313^5*299-313^6*36 = 313^5*(299-313*36)=313^5*(299-(299+14)*3...
=313^5*(299-299*36-14*36)
= 313^5*(299(1-36)-14*36)
=315^5*(35*299-14*36)
=315^5*(7*5*299-7*2*36)
=315^5*7*(5*299-2*36) chia hết cho 7
Vậy 313^5*299-313^6*36 chia hết cho 7