Question

If 6.8 and 12 are th, mh and nth terms of an A.P. and f(x) = nx? + 21x - 2m, then the equation
f(x) = 0 has -
(A) a root between 0 and 1
(B) both roots imaginary.
(C) both roots negative.
(D) both roots greater than 1.​

Answer 1

1. c. both. roots. are. negative