Gujarat BoardEnglish MediumSTD 11 CommerceStatisticsGeometric progression1 Mark
Question
For a $G.P$., sum of any two consecutive terms is zero, then what will be the common ratio ?
✓
Answer
Sum of two consecutive terms $=0$
$\therefore T_1+T_2=0$
$\therefore a + ar =0$
$\therefore a (1+ r )=0$
$\therefore 1+ r =0$
$r =-1$
Hence, Common ration will be $r=-1$.
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