A sequence has the rule .
Is the number 10 a term in the sequence?
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A sequence has the rule .
Is the number 10 a term in the sequence?
To solve whether 10 is a term in the sequence defined by , follow these steps:
Since , which is not an integer, it confirms that 10 is not a term in the sequence . For a number to be a term in this sequence, must be an integer. Thus, 10 is not part of the sequence because it does not satisfy this condition.
Therefore, the number 10 is not in the sequence.
The correct answer choice is:
No
No
12 ☐ 10 ☐ 8 7 6 5 4 3 2 1
Which numbers are missing from the sequence so that the sequence has a term-to-term rule?
In sequences, n represents the position of a term (1st, 2nd, 3rd, etc.). You can't have a 7/4th term or a negative position, so n must be a positive whole number!
If you get a decimal or fraction for n, it means that number is not in the sequence. Only whole number positions make sense in sequences.
Set up the equation , solve for n. If n is a positive integer, the number is in the sequence. If not, it isn't!
You could try n=1, 2, 3... but that's inefficient! It's much faster to solve the equation directly like we did: 4n+3=10.
When n=1: 4(1)+3=7
When n=2: 4(2)+3=11
When n=3: 4(3)+3=15
Notice 10 isn't there, and it falls between 7 and 11!
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