Question

J(m) = 2^m-1
What is j (4)?
Enter your answer in the box.

Answer 1

j(m) = 2ᵐ ⁻ ¹

for functions you will replace the number in the brackets with the letter! so:

j(4) = 2⁴ ⁻ ¹

= 2³

= 8

Answer 2

15

Explanation:

You want to evaluate j(4), given j(m) = 2^m -1.

Evaluation

To evaluate an expression, put the value of the variable where the variable is, and do the arithmetic.

j(4) = 2^4 -1 = 16 -1

j(4) = 15

__

Additional comment

If you left off the parentheses that would suggest this should be j(m) = 2^(m-1), the value would be ...

`j(m)=2^(m-1)\\\\j(4)=2^(4-1)= 2^3 =8`

Your calculator can evaluate the properly written expression.

<95141404393>