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The [tex]\( 50^{\text{th}} \)[/tex] term of this number sequence is 199.

(b) Write down the [tex]\( 51^{\text{st}} \)[/tex] term of this sequence.

[tex]\[ 4(51) - 1 \][/tex]
[tex]\[ 204 - 1 = 203 \][/tex]

The number 372 is not a term of this sequence.

(c) Explain why.


Sagot :

To explain why 372 is not a term of the given sequence, let's follow these steps:

1. Understanding the Sequence Formula:
The formula for the nth term of the sequence is [tex]\(4n - 1\)[/tex].

2. Setting the Sequence Formula Equal to 372:
To find out if 372 is a term in the sequence, we set the formula equal to 372:
[tex]\[ 4n - 1 = 372 \][/tex]

3. Solving for [tex]\(n\)[/tex]:
Rearrange the equation to solve for [tex]\(n\)[/tex]:
[tex]\[ 4n = 372 + 1 \][/tex]
[tex]\[ 4n = 373 \][/tex]
[tex]\[ n = \frac{373}{4} \][/tex]
[tex]\[ n = 93.25 \][/tex]

4. Determining if [tex]\(n\)[/tex] is an Integer:
For 372 to be a term of the sequence, [tex]\(n\)[/tex] must be a positive integer because our sequence only works with integer positions. Here, [tex]\(n = 93.25\)[/tex], which is not an integer.

Since [tex]\(n\)[/tex] is not an integer, it indicates that 372 cannot be expressed in the form of [tex]\(4n - 1\)[/tex]. Therefore, 372 is not a term of this sequence.