Question

Answer Is not C
please help​

Answer 1

B

Explanation:

Well since it is arthimetic sequence we know the formula

We know d is difference between second term and first so it will be -5- (-12)= -5+12= 7

`a_(n)= a _(1)+ d (n-1) \\a_(n)= -12+7(n-1)\\a_(n) = -12+7n-7\\a_(n)= 7n-19`

the domain of this is 1,2,3,4.......

range is -12,-5,2,9.......

Therefore answer is B.