If p,q,r are in AP and are positive, the roots of the quadratic equation px2 + qx + r=0 are all real for : (A) mod(r/p – 7) ＞= 4(3)½(B) mod(p/r – 7) ＜4(3)½(C) all p and r(D) no p and r

Nandish Panchal , 6 Years ago

Grade 11