Solve n-0.5n: Finding the 8th Element in a Linear Sequence

Question

A sequence has a term-to-term rule of $n-0.5n$ .

What is the 8th element of the sequence?

00:00 Find the 8th element in the sequence

00:03 Location of the desired element according to the given data

00:09 Substitute the appropriate position in the formula and solve to find the element

00:17 Always solve multiplication and division before addition and subtraction

00:24 And this is the solution to the question

To find the 8th element of this sequence, we must apply the given term-to-term rule:

The rule provided is $n - 0.5n$ . Simplifying this, we obtain:

$n - 0.5n = 0.5n$

Thus, for the 8th term, substitute $n = 8$ into the simplified rule:

$0.5 \times 8 = 4$

Therefore, the 8th element of the sequence is $4$ .

Thus, the correct answer is choice 1: $4$ .

$4$