audrey05 audrey05

17-02-2018
Mathematics

contestada

Prove the divisibility of the following number:
7^6 +7^5 -7^4 is by 11

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DrPepper21 DrPepper21

17-02-2018

7^6=117649
7^5=16807
7^4=2401

117649+16807-2401=132055

132055/11=12005
Because the above division problem led to the result of a whole number (or integer), that means that the number given is divisible by 11.

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