What’s the answer to this ?

Question

W(n) =3^n -2 find w(2)

w(2) =

this is for a test I’m doing, in 9th grade math class. Can I please get some help ?? .................................

Answer 1

IF you mean 3^(n-2) then w(2) = 3^(2-2) = 3^0 = 1 and w(2) = 1

3 to the zero power = 1

But IF you really meant 3^n - 2 = (3^n)-2, then w(2) = 3^2 - 1 = 9-1 = 8

without parentheses, w(2) = 8

PEMDAS is the order of operations, where E = exponents and S = subtraction. Without P (parentheses), you do 3^n first and then subtract 2. With parentheses, 3^(n-2) you'd subtract 2 first, then raise 3 to the zero power.