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7 (a) The fifth term of an arithmetic sequence is 18, and the 11th term is 60. What is a rule for the sequence?
7 (a) The fifth term of an arithmetic sequence is 18, and the 11th term is 60. What is a rule for the sequence? f(n)=-10+7(n-1) f(n)=-6+6(n-1) f(n)=7-10(n-1) f(n)-6-6(n-1) (b) Using the formula above, find a
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