Dayton3456 Dayton3456
  • 02-05-2019
  • Mathematics
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Please answer I’ll rate brainlyest

Please answer Ill rate brainlyest class=

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kudzordzifrancis
kudzordzifrancis kudzordzifrancis
  • 02-05-2019

Answer:

The third choice is correct

Step-by-step explanation:

The given expression is

[tex]2^n-1[/tex]

when n=7, we substitute into the formula to obtain;

[tex]2^7-1[/tex]

Note that;

[tex]2^7=2\times 2\times 2\times 2\times 2\times 2\times 2=128[/tex]

[tex]2^7-1=128-1=127[/tex]

The third choice is correct

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