if m th term of an AP be 1/n and n th term be 1/m . then show that mn th term is 1. plzzzzzz give the answer quickly it's so urgent..
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Tm = 1/n & Tn = 1/m
a +(m-1)d = 1/n
a + (n-1)d = 1/m
-------------------------
(m-n)d = m-n/mn
d = 1/mn , & a = 1/mn
now , Tmn = a +(mn-1)d = 1/mn +(mn-1) x 1/mn
=1 +mn-1 / mn = mn/mn = 1.....hence prooved!!
hope ths hlps u ..!!
a +(m-1)d = 1/n
a + (n-1)d = 1/m
-------------------------
(m-n)d = m-n/mn
d = 1/mn , & a = 1/mn
now , Tmn = a +(mn-1)d = 1/mn +(mn-1) x 1/mn
=1 +mn-1 / mn = mn/mn = 1.....hence prooved!!
hope ths hlps u ..!!
appu35:
how u find the value of a, and d
yes.how you find the value of a and d????
i got it ,,he subtract the equation thus (a) get eliminate and value of d is found
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