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dlinn [17]
2 years ago
12

The explicit rule for a sequence is

Mathematics
2 answers:
Sphinxa [80]2 years ago
6 0
The rule should be a(n)=a(1)+(n-1)d
d=-11 in this case, so a(n)=a(1)-11(n-1)
a(n)=a(1)-11n+11
a(n)=a(1)+11-11n
a(1)+11=48, 
a(1)=37
B is the correct answer. 
pishuonlain [190]2 years ago
3 0
For an explicit formula in its simplified form, we must evaluate the first two terms.

For a_n=48-11n, a_1=48-11=37, and a_2=48-22=26. We see that the common difference is 37-26=-11, and a_1=37, so we write,
a_1=37, \ \ \ a_n=a(n-1)-11. 

The correct answer is B.


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