\(313^5.299-313^6.36\)
\(=313^5.299-313^636\)
\(=313^5\left(299-313.36\right)\)
Ta có:
Ta có: \(299\equiv5\left(mod7\right)\)
\(313\equiv5\left(mod7\right)\)
\(36\equiv1\left(mod7\right)\)
=> \(299-313.36\equiv5-5.1=0\left(mod7\right)\)
=> \(299-313.36⋮7\)
=> \(313^5.299-313^6.36⋮7\)
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