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Pratyush Ranjan Roul Grade: 11
        
If Sdenotes the sum of first n terms of an A.P.  n> such that Sm/S=m2/n, then am/a=  ?
one year ago

Answers : (2)

Nishant Vora
IIT Patna
askIITians Faculty
2469 Points
										223-1153_Capture.PNG
										
one year ago
moumi roy
78 Points
										
SM/SN=M2/N2
{M(2a+(M-1)d)/2}/{N(2a+(N-1)d)/2}=M2/N2
(2a+(M-1)d)/(2a+(N-1)d)=M/N
putting M=2M-1 &N=2N-1
2(a+(M-1)d)/2(a+(N-1)d)=(2M-1)/(2N-1)
am/an=(2M-1)/(2N-1)---ans
one year ago
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