Answer:
2. Check your work
3. Correct
Step-by-step explanation:
2. The equation tells you ...
[tex]a_2=2a_1+4=2(-1)+4=-2+4=2[/tex]
Only one answer choice has +2 as the second term of the sequence. The one you selected is not it.
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3. The expression can be simplified to ...
[tex]a_n=\dfrac{(n+3)!}{n+3}=(n+2)![/tex]
Filling in n=1 tells you all you need to know:
[tex]a_1=(1+2)!=3\cdot 2\cdot 1=6[/tex]
The answer you selected has a first term of 6, so your choice is correct.
