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Find the 66th term of the arithmetic sequence 
-27,-41,-55,dots
Answer:

Find the 6666th term of the arithmetic sequence 27,41,55, -27,-41,-55, \ldots \newlineAnswer:

Full solution

Q. Find the 6666th term of the arithmetic sequence 27,41,55, -27,-41,-55, \ldots \newlineAnswer:
  1. Identify common difference: Identify the common difference in the arithmetic sequence.\newlineThe common difference dd is the difference between any two consecutive terms. We can find it by subtracting the first term from the second term.\newlined=41(27)=41+27=14d = -41 - (-27) = -41 + 27 = -14
  2. Use formula for nth term: Use the formula for the nth term of an arithmetic sequence.\newlineThe nth term ana_n of an arithmetic sequence can be found using the formula:\newlinean=a1+(n1)da_n = a_1 + (n - 1)d\newlinewhere a1a_1 is the first term, nn is the term number, and dd is the common difference.
  3. Plug values for 6666th term: Plug the values into the formula to find the 66th66^{th} term.\newlinea1=27a_1 = -27 (the first term)\newlinen=66n = 66 (the term number we want to find)\newlined=14d = -14 (the common difference found in Step 11)\newlineNow, calculate the 66th66^{th} term using the formula:\newlinea66=27+(661)(14)a_{66} = -27 + (66 - 1)(-14)
  4. Perform calculations: Perform the calculations.\newlinea66=27+(65)(14)a_{66} = -27 + (65)(-14)\newlinea66=27910a_{66} = -27 - 910\newlinea66=937a_{66} = -937