How to find the first term, the common difference, and the nth term of the arithmetic sequence here? 8th term is 4; 18th term is -96
3 Answers
First term is
Explanation:
Let
terms of an A.P. series
we get ,
equation (1) we get,
Hence first term is
The first term is
Explanation:
If a Arithmatic Sequence has first term
According to question
Put n=8 in equation (1)
but
Hence
and
Put n=18 in equation (1)
but
Hence
by putting value of
Transfer
Divide by 10
Put the value of
By Equation (2)
Hence the first term is
Common difference:
first term:
nth term:
Explanation:
8th term
18th term
General formula for nth tern
Simplifying
Simplifying
Subtrtacting (1) from (2)
Substituting
in (1)