Question

26 The numbers below form an arithmetic sequence.-4, -7 -10,- 13 - 16, ..Which expression can be used to find the nth term in the sequence?F-3n-1G3n - 4H-30 + 4J3n + 1

Answer 1

-7 --4 = -3

also

-10 --7= -3

Then expression is

= (1/2) •n •[ 2•-4 + ( n-1)•-3] =

= -3n - 1

Answer is

OPTION F) -3n -1