Question 1118835
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Your equation to find an unknown value of "k" is


{{{(k+1)/(k-3)}}} = {{{(4k-2)/(k+1)}}}


( saying that the ratio {{{a[2]/a[1]}}}  is the same as the ratio  {{{a[3]/a[2]}}} ).


To solve it,  multiply both sides by  (k-3)*(k+1)  and then simplify and solve the equation you will get.
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