Question 1181058


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

Find {{{a[19]}}} when {{{a[1] = 9}}}, {{{d =-5}}}

{{{a[19] = 9 + ( 19 - 1) (-5) }}}

{{{a[19] = 9 + 18 (-5) }}}

{{{a[19] = -81}}}


answer: d. {{{ -81}}}