5 x 3^n
a)15,30,45,60
b)5,15,45,135
c)0,15,45,135
d)15,45,135,405
just took the test, the answer is
d) 15,45,135,405
To determine the sequence for 5 x 3^n, we need to plug in different values of n and calculate the result. Let's do this step-by-step:
When n = 0:
5 x 3^0 = 5 x 1 = 5
When n = 1:
5 x 3^1 = 5 x 3 = 15
When n = 2:
5 x 3^2 = 5 x 9 = 45
When n = 3:
5 x 3^3 = 5 x 27 = 135
Therefore, the correct sequence is:
b) 5, 15, 45, 135
To find the values of 5 x 3^n, you need to substitute different values of n and calculate the expression.
Let's start by substituting n = 0:
5 x 3^0 = 5 x 1 = 5
Next, let's substitute n = 1:
5 x 3^1 = 5 x 3 = 15
Moving on to n = 2:
5 x 3^2 = 5 x 9 = 45
Finally, for n = 3:
5 x 3^3 = 5 x 27 = 135
So, the values of 5 x 3^n are 5, 15, 45, and 135.
The answer is: b) 5, 15, 45, 135
3^n: 1,3,9,27
so, which is 5 times that?
Hint: only one sequence starts with 5