The term of an arithmetic sequence 3-5n. write first term and common difference
Answers
Answered by
10
Given:-
To find:-
- First term (a)
- Common difference (d)
Solution:-
- First term ( )
★ Put value of n = 1
- Second term ( )
★ Put value of n = 2
- Third term ( )
★ Put value of n = 3
So, the required AP is
Now,
★
and,
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Answered by
1
AnSwer:-
The first term is -2 and common difference is -5.
Given:
In arithmetic sequence,
➡tn=3-5n
To Find:
First term and common difference.
SoLution:
•tn=3-5n
Let n be 1,
t1=3-5(1)
=>t1=3-5
=>t1= -2
Let n be 2,
t2=3-5(2)
=>t2=3-10
=>t2= -7
Common difference (d)=t2-t1
t2-t1= -7-(-5)
t2-t1= -2
The first term is -2 and common difference is -5.
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