Question

Evaluate 2n -1, where n=7 Options 1,64,127

Answer 1

Answer:

127

Step-by-step explanation:

n = 7

$2^n - 1 =$

$= 2^7 - 1$

$= 128 - 1$

$= 127$

Answer 2

Answer:

127

Step-by-step explanation:

We are given the expression:

(2^n)-1

We also know that n=7. Therefore, we can substitute 7 in for n.

(2^7)-1

Evaluate the exponent first. 2^7 is equal to multiplying 2, 7 times.

2^7=2*2*2*2*2*2*2=128

2^7=128

128-1

Subtract 1 from 128

127