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Question

1) 49 to the power of n plus 16 n minus 1 is divisible by A for all n element of N
2) 3 to the power of 2 n end exponent plus 7 is divisible by B for all n element of N
3) 4 to the power of n minus 3 n minus 1 is divisible by C n element of N
4) 3 to the power of 3 n end exponent minus 26 n minus 1 is divisible by D for all n element of N then the increasing order of A comma B comma C comma D is

  1. A comma B comma C comma D
  2. C comma B comma A comma D
  3. straight B comma straight C comma straight A comma straight D
  4. D comma A comma C comma B

The correct answer is: straight B comma straight C comma straight A comma straight D

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