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Complete the recursive formula of the arithmetic sequence\newline4,22,40,58,4, 22, 40, 58, \dots. \newlineb(1)=b(1)=\square\newlineb(n)=b(n1)+b(n) = b(n-1) +\square

Full solution

Q. Complete the recursive formula of the arithmetic sequence\newline4,22,40,58,4, 22, 40, 58, \dots. \newlineb(1)=b(1)=\square\newlineb(n)=b(n1)+b(n) = b(n-1) +\square
  1. Find First Term: To find the first term of the arithmetic sequence, we look at the first given term in the sequence.\newlineThe first term is 44.
  2. Find Common Difference: To find the common difference, we subtract the first term from the second term.\newlineCommon difference dd = 224=1822 - 4 = 18.
  3. Check Consistency: We check if the common difference is consistent by subtracting subsequent terms.\newline402240 - 22 should also equal 1818, and 584058 - 40 should also equal 1818.\newlineLet's check:\newline4022=1840 - 22 = 18 and 5840=1858 - 40 = 18.\newlineThe common difference is consistent.
  4. Write Recursive Formula: Now we can write the recursive formula for the arithmetic sequence.\newlineThe first term is b(1)=4b(1) = 4.\newlineThe recursive formula is b(n)=b(n1)+18b(n) = b(n-1) + 18 for n > 1.