Let  be the terms of a sequence and let Case I: If  are in A.P., then  is quadratic in ‘’. If  are in A.P., then  is cubic in Case II: If  are not in A.P., but in G.P., then , where  is the common ratio of the G.P.  and  Again, ifare not in G.P. but  are in G.P., then  is of form  and  is the common ratio of the G.P.  and
	The sum of 20 terms of the series  is
	a)	4010	b)	3860	c)	4240	d)	None of these

Question ID - 51133 | SaraNextGen Top Answer

Let  be the terms of a sequence and let Case I: If  are in A.P., then  is quadratic in ‘’. If  are in A.P., then  is cubic in Case II: If  are not in A.P., but in G.P., then , where  is the common ratio of the G.P.  and  Again, ifare not in G.P. but  are in G.P., then  is of form  and  is the common ratio of the G.P.  and
	The sum of 20 terms of the series  is
	a)	4010	b)	3860	c)	4240	d)	None of these