If tn denotes the nth term of an A.P. an...

If `t_n` denotes the nth term of an A.P. and `t_p= 1/q, t_q= 1/p` then which one of the following is necessarily a root of the equation `(p+2q-3r)x^2+(q+2r-3p)x+(r+2p-3q)=0` (A) `t_p` (B) `t_q` (C) `t_(pq)` (D) `t_(p+q)`

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