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Sedbober [7]
2 years ago
6

In an arithmetic sequence if a1 =7 and d = 3, find a64

Mathematics
2 answers:
mrs_skeptik [129]2 years ago
6 0

Answer:

a_{64}=196

Step-by-step explanation:

<u>Arithmetic sequence</u>

General form of an arithmetic sequence: a_n=a+(n-1)d

where:

  • a_n is the nth term
  • a is the first term
  • d is the common difference between terms

Given:

  • a_1=7
  • d=3

Substituting these into the equation to find the nth term:

\implies a_n=7+(n-1)3

\implies a_n=3n+4

To find the 64th term, substitute n = 64 into the formula:

\implies a_{64}=3(64)+4=196

masya89 [10]2 years ago
5 0

Answer:

<u>196</u>

Step-by-step explanation:

<u>Formula for the nth term</u>

  • aₙ = a₁ + (n - 1) d

<u>Taking n = 64</u>

  • a₆₄ = 7 + 63(3)
  • a₆₄ = 7 + 189
  • a₆₄ = <u>196</u>
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