4 = 7 - 3
1 = 4 - 3
- 2 = 1 - 3
- 5 = - 2 - 3
This is arithmetic proggresion.
n-th member of A.P is:
an = a1 + ( n - 1 ) d
where a1 is first term , d is common difference
In this case:
a1 = 7 , d = - 3
an = a1 + ( n - 1 ) d
an = 7 + ( n - 1 ) • ( - 3 )
an = 7 - 3 n + 3
an = - 3 n + 10
Next term is a6 so n = 6
an = - 3 n + 10
a6 = - 3 • 6 + 10 = - 18 + 10
a6 = - 8
4. Write a recursive formula for the sequence 7, 4, 1, –2, –5, .... Then find the next term
4 answers
each term is 3 less than the previous term
a_1 = 7
a_n = a_(n-1) - 3
a_n = a_(n-1) - 3
lol three tutors in one thread....