the 20th term of the progression 1,4,7,10.......is
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Answered by
6
Hi ,
1, 4 , 7 , 10 , ...
Here ,
a2 - a1 = 4 - 1 = 3
a3 - a2 = 7 - 4 = 3
Therefore ,
a2 - a1 = a3 - a2 = 3
common difference = d = 3
Therefore ,
given sequence is in A.P
we know that ,
nth term = an = a + ( n -1 )d
a = 1 , n = 20 , d = 3
a20 = 1 + ( 20 - 1 ) 3
= 1 + 19 ×3
= 1 + 57
a20 = 58
I hope this helps you.
:)
Answered by
0
Answer:
58
Step-by-step explanation:
a20=a+19d
a=1,d=3
a20=1+19*3
=57+1=58
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