find the 20th term of an AP :3,6,9.........
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Answer:
Heyy
Step-by-step explanation:
In the given A.P.,
3, 6, 9............
a= 3, d= 6-3= 3, n= 20, t20=?
by using formula,
tn= a+(n-1)d
t20= 3+(20-1)3
= 3+ 19×3
= 3+ 57
t20= 60
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