1)What are the first five terms of the sequence given by the formula an=4n+1 ?
2 answers:
We are asked to determine the first five terms of the sequence given by the formula an=4n+1, if n is equal to 1 to 5, then an is equal to 5, 9, 13, 17, 21. Answer is A. In 2, given the sequence 8,6,4,2 then the expression is a1=8, an = an-1-2
Answer:1) c. 5,9,13,17,21
2) a. a1=8, an=an-1 -2
Step-by-step explanation: 1) an=4n+1
⇒ a1=4×1+1=5
a2=4×2+1=9
a3=4×3+1=13
a4=4×4+1=17
a5=4×5+1=21
2) clearly a1=8 and then the terms of series are decreasing by 2
so, an=an-1 -2
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