Find the 18th term and general term of
on Ap 16,11,6, 1,-4,9
Answers
Answered by
1
Answer:
a+17d
a=16, d=16-11=5
s/n =n/2(2a(n-1)d)
Step-by-step explanation:
use this fomula a solve it...
Answered by
0
Answer:
The 18th term is -69
Step-by-step explanation:
formula of A.P = a+(n-1)d
a is 1st term = 16
n is the term given = 18
d is the common difference =-9-(-4)=-4-1=1-5=6-11=11-16=-5
a+(n-1)d
16 + (18-1)(-5)
16 + (17)(-5)
16 - 85
-69
The 18th term is -69
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