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fgiga [73]
3 years ago
9

D=5, a10=48. find a45

Mathematics
1 answer:
arsen [322]3 years ago
7 0

Answer:

223

Step-by-step explanation:

  1. it is an arithmetic sequence and we will use this formula
  2. an = a1+(n-1)d
  3. now first we will find a1
  4. a10= a1+(10-1)d
  5. 48= a1 +9×5
  6. after simplify
  7. a1=3
  8. now using again this formula we can easily find a45
  9. a45= 3+(45-1)4=223
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