Question

Help please and thank youuu

Answer 1

`a_1=-4\\d=7\\x=3\\y=10\\z=17`

Explanation:

First term is the first term in the sequence. The sequence formula is given as

`a_n=-4+7(n-1)`, where n is the
`n^(th)` term. The first term,
`a_1`, can be directly lifted from the expression.

`a_1=-4`

The common difference can be obtained by as
`(n_2)/(n_1)` or lifted from the expression.

`d=7`

Substitute for n in the expression to obtain the 2nd, 3rd and 4th terms (x,y,z) as:-

`a_2(x)=-4+7(2-1)=3\\a_3(x)=-4+7(3-1)=10\\a_4(x)=-4+7(4-1)=17\\`