MathematicsMedium178×since 2002Q5209Let a, b and c be the 7^th, 11^th and 13^th terms respectively of a non-constant A.P. If these are also three consecutive terms of a G.P., then ac{a \over c}ca equal to :A2B12{1 \over 2}21C713{7 \over 13}137D4Check answerSkip