The nth term of an arithmetic sequence is 5n – 2 .
a) What is the first term of the sequence ?
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Answer:
Step-by-step explanation:
lf the nth term of an AP is (5n-2), find its (i) first term, (ii) common difference and (iii) 19th term. ⇒T1=(5×1-2)=3andT2=(5×2-2)=8.
(i) first term = 3.
(ii) common difference =(T2−T1)=(8−3)=5.
(iii) 19th term = a +(19-1) d, where a = 3 and d = 5.
=(3+18×5)=93.
Answered by
0
Answer:
an=5n-2
In this equation put n=1, you will get
a1=5×1-2=3
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