Question 1155106

if {{{a[1] =-5}}} and {{{d=8}}} 

(a) 
an equation for the nth term is:

{{{a[n] =a[1] +(n-1)d}}}

{{{a[n] =-5 +(n-1)8}}}-> an equation for the nth term


and 

(b) the first {{{3}}} terms are: 

{{{a[1] =-5}}}
{{{a[2] =-5 +(2-1)8}}}=>{{{a[2] =-5 +8}}}=>{{{a[2] =3}}}
{{{a[3] =-5 +(3-1)8}}}=>{{{a[3] =-5 +2*8}}}=>{{{a[3] =-5+16}}}=>{{{a[3] =11}}}