Question 1191254
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Then the common difference is  -4 - 2 = -6;


therefore, a = -4 -6 = -10  as the next term of the arithmetic progression;


hence,  the common ratio is  {{{(-10)/(-4)}}} = 2.5;


It implies that b = 2.5*(-10) = -25 as the next term of the geometric progression.


<U>ANSWER</U>.  a= -6;  b= -25.
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Solved, answered and explained.