The fourth term of an arithmethic sequence is 23 and the eleventh term is 65 . Find the 100th term
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Answer:
a+3d=23 (1) eq'n
a+10d=65 (2)eq'n
Step-by-step explanation:
applying elimination method
a+3d=23
a+10d=65
- - -
-7d=-42
d=6
put in (1)
a+3×6=23
a=23-18
a=5
100term=a+99d
5+99×6
5+ 594
599
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