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In an arithmetic sequence, the first term, 
a_(1), is equal to 5 , and the seventh term, 
a_(7), is equal to 29 . Which number represents the common difference of the arithmetic sequence?

d=4

d=5

d=6

d=7

In an arithmetic sequence, the first term, a1 a_{1} , is equal to 55 , and the seventh term, a7 a_{7} , is equal to 2929 . Which number represents the common difference of the arithmetic sequence?\newlined=4 d=4 \newlined=5 d=5 \newlined=6 d=6 \newlined=7 d=7

Full solution

Q. In an arithmetic sequence, the first term, a1 a_{1} , is equal to 55 , and the seventh term, a7 a_{7} , is equal to 2929 . Which number represents the common difference of the arithmetic sequence?\newlined=4 d=4 \newlined=5 d=5 \newlined=6 d=6 \newlined=7 d=7
  1. Given terms: We are given the first term of an arithmetic sequence a1=5a_{1} = 5 and the seventh term a7=29a_{7} = 29. We need to find the common difference dd. The formula for the nth term of an arithmetic sequence is an=a1+(n1)da_{n} = a_{1} + (n - 1)d.
  2. Express seventh term: We can use the formula to express the seventh term in terms of the first term and the common difference: a7=a1+6da_{7} = a_{1} + 6d.
  3. Substitute values: Substitute the given values into the equation: 29=5+6d29 = 5 + 6d.
  4. Solve for d: Now, solve for d: 295=6d29 - 5 = 6d.
  5. Simplify equation: Simplify the equation: 24=6d24 = 6d.
  6. Divide by 66: Divide both sides by 66 to find dd: d=246d = \frac{24}{6}.
  7. Calculate d: Calculate the value of d: d=4d = 4.

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