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Vikas TU Grade: 12th Pass
        If the mth term of an A.P is n and nth term is m, find the rth term.
6 years ago

Answers : (3)

PRIYANKA TATA ASKIITIAN
78 Points
										

let a be the first term,d be common diff.


Tn=a+(n-1)d=m


Tm=a+(m-1)d=n


=>n-a=(m-1)d


=>d=n-a/m-1-----------(1)


now d also equal to m-a/n-1


=>m-a/n-1=n-a/m-1


on solving for a,we get a=m+n-1-------------(2)


put eqn2 in eqn1..we get d=-1


=>Tr=a+(r-1)d


puttin values of a and d,we get Tr = m+n-r

6 years ago
Durgesh Prasher
21 Points
										

m+n-r is answer


i wrote answers but this disgusting site on its own log outs ma accounts so lost whole expaination


telling in short


solve equation of am and an and get value of a and d d comes -1 and put ar=a+(n-1)d


and put values of a and d to get answers

6 years ago
Vikas TU
3978 Points
										

thnx


yr. ansr is correct!


Pleaz tell me ur e-mail id


or accont o facbook


so next time i can ask qustns frm u!

6 years ago
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