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215 OR 221 ............according to two different methods.... METHOD 1: if we take the difference between the consecutive terms ,THESE DIFFRENCES BETWEEN THE DIFFRENCES OF ABOVE CONSECUTIVE DIFFERENCES OF THE ORIGINAL SERIES...., they come as 12,18,24,.....(a.p with d=6) so if we continue with the above series by taking 30 as the suceeding term , the answer will be 215( WE ADD 91 TO THE ABOVE ORIGINAL SERIES..........) METHOD2:if we take the obtained series of 12,18,24,....we can find that alternative terms are in gp....so, if in this way, we can take 36 as the suceeding value......then we get the ans as 221(we add 97 to the original sequence.........) PLZ REPLY ME ABOUT THE CORRECT ANSWER........

@ashok..this isnt the right option:(

2 sinA + (2 sina)^2................ apply the summation formula of gp........a(1-r^n)/r-1