Question 1086901

{{{191}}}, {{{175}}}, {{{159}}}, {{{143}}} ,...

see if there is constant difference between terms
{{{175-191=-16}}}
{{{143-159=-16}}}

so, {{{d=-16}}}

check:
{{{a[1]=191}}}, 
{{{a[2]=191-16=175}}}, 
{{{a[3]=175-16=159}}}, 
{{{a[4]=159-16=143 }}},...
 
find {{{a[0]}}}=>
{{{ a[0]-16=191}}} 
{{{a[0]=191+16}}}
{{{a[0]=207}}}

so, in general n-th term formula is:

{{{a[n] = 207 - 16n}}}  where {{{n}}}={{{1}}},{{{2}}},{{{3}}},....

since by definition, an arithmetic sequence goes from one term to the next by always adding (or subtracting) the same value known as "common difference", in your case we have an {{{arithmetic}}}{{{ sequence}}}