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Find the 14 th term of the arithmetic sequence 
x+8,8x+2,15 x-4,dots
Answer:

Find the 1414 th term of the arithmetic sequence x+8,8x+2,15x4, x+8,8 x+2,15 x-4, \ldots \newlineAnswer:

Full solution

Q. Find the 1414 th term of the arithmetic sequence x+8,8x+2,15x4, x+8,8 x+2,15 x-4, \ldots \newlineAnswer:
  1. Arithmetic Sequence Formula: To find the 14th14^{\text{th}} term of an arithmetic sequence, we need to determine the common difference between consecutive terms and then use the formula for the nthn^{\text{th}} term of an arithmetic sequence, which is an=a1+(n1)da_n = a_1 + (n - 1)d, where ana_n is the nthn^{\text{th}} term, a1a_1 is the first term, and dd is the common difference.
  2. Find Common Difference: First, let's find the common difference by subtracting the first term from the second term: (8x+2)(x+8)=7x6(8x + 2) - (x + 8) = 7x - 6.
  3. Verify Common Difference: Now, let's verify the common difference by subtracting the second term from the third term: (15x4)(8x+2)=7x6(15x - 4) - (8x + 2) = 7x - 6. Since the common difference is the same, we can confirm that the sequence is arithmetic.
  4. Calculate 1414th Term: Using the common difference and the first term of the sequence, we can find the 1414th term using the formula: a14=(x+8)+(141)(7x6)a_{14} = (x + 8) + (14 - 1)(7x - 6).
  5. Calculate 1414th Term: Using the common difference and the first term of the sequence, we can find the 1414th term using the formula: a14=(x+8)+(141)(7x6)a_{14} = (x + 8) + (14 - 1)(7x - 6).Now, let's calculate the 1414th term: a14=(x+8)+13(7x6)=(x+8)+(91x78)=92x70a_{14} = (x + 8) + 13(7x - 6) = (x + 8) + (91x - 78) = 92x - 70.

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