Question

3. For which of the numbers, from n = 2 to 8, is 2n-1 a prime?​

Answer 1

Step-by-step explanation:

for the value of n = 5,8 in this equation 2n- 1 is not a prime while rest values gives us a prime number

Answer 2

Answer

2n-1 is a prime number

let n=2

2×2-1=3

3 is a prime number

the numbers that satisfy this are 3,4,6,7