If be four real members of the same sign

MATHEMATICS · Single correct · CBSE · Mathematics · Sequences and Series · Sequences and Series

Problem

If ai,i=1,2,3,4a_i, i = 1, 2, 3, 4 be four real members of the same sign, then the minimum value of ∑aiaj,i,j∈{1,2,3,4},i≠j\sum \frac{a_i}{a_j}, i, j \in \{1, 2, 3, 4\}, i \neq j is: (a) 6 (b) 8 (c) 12 (d) 24

Related theory

Browse the problem library