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Vesna [10]
3 years ago
11

Find the 98th term for the arithmetic sequence 3,4.2,5.4,6.6,7.8,...

Mathematics
1 answer:
prisoha [69]3 years ago
6 0
A₁ = 3
a₂ = 4.2

d = a₂ - a₁
   = 4.2 - 3
   = 1.2

a₉₈ = a₁ + d(n-1)
      = 3 + 1.2(98-1)
      = 3 + 1.2×97
      = 3 + 116.4
      = 119.4
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A, it's always true
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