Question

8. Prove that 2" + 6 x 9" is always divisible by 7 for any positive integer n.
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Answer 1

Answer:

By DMAS rule 6×9= 54+2 = 56÷7=8

Answer 2

Answer:

$6 \times 9 = 54 \\ 54 + 2 = 56 \\ 7 \div 56 = 8 \\ \\ \\ hence \: divisible$