Question 1083614

Given an arithmetic series
{{{a[1]}}}, {{{a[1] + d}}}, {{{a[1] + 2d}}}, ..., the number {{{d}}} is called the common difference associated to the sequence


{{{-1}}},{{{ -5}}}, {{{-9}}}, {{{-13}}}, {{{-17}}}, {{{-21}}}, …

the common difference is {{{d=-4}}}

check:

{{{-1}}}

{{{-1+(-4)=-5}}}

{{{-5+(-4)=-9}}}...and so on


answer is: B) {{{-4}}}