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Find the 50 th term of the arithmetic sequence 
-30,-26,-22,dots
Answer:

Find the 5050 th term of the arithmetic sequence 30,26,22, -30,-26,-22, \ldots \newlineAnswer:

Full solution

Q. Find the 5050 th term of the arithmetic sequence 30,26,22, -30,-26,-22, \ldots \newlineAnswer:
  1. Use Formula: To find the 5050th term of an arithmetic sequence, we need to use the formula for the nth term of an arithmetic sequence, which is given by:\newlinean=a1+(n1)d a_n = a_1 + (n - 1)d \newlinewhere an a_n is the nth term, a1 a_1 is the first term, n n is the term number, and d d is the common difference between the terms.
  2. Identify First Term: First, we identify the first term a1 a_1 of the sequence. From the given sequence (30-30, 26-26, 22-22, ...), the first term a1 a_1 is 30-30.
  3. Determine Common Difference: Next, we determine the common difference d d by subtracting the first term from the second term: d=26(30)=26+30=4 d = -26 - (-30) = -26 + 30 = 4 .
  4. Find 5050th Term: Now that we have the first term and the common difference, we can find the 5050th term a50 a_{50} using the formula:\newlinea50=a1+(501)d a_{50} = a_1 + (50 - 1)d \newlinea50=30+(501)×4 a_{50} = -30 + (50 - 1) \times 4
  5. Perform Calculation: We perform the calculation inside the parentheses first:\newline501=49 50 - 1 = 49
  6. Multiply and Add: Next, we multiply 4949 by the common difference 44:\newline49×4=196 49 \times 4 = 196
  7. Multiply and Add: Next, we multiply 4949 by the common difference 44:\newline49×4=196 49 \times 4 = 196 Finally, we add this result to the first term to find the 5050th term:\newlinea50=30+196 a_{50} = -30 + 196 \newlinea50=166 a_{50} = 166

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