23.若"∃x∈R\exist x\in R∃x∈R,(7a−1)x2−(4a+2)x+3<0(7a-1)x^{2}-(4a+2)x+3<0(7a−1)x2−(4a+2)x+3<0"为真命题,则实数aaa的取值范围为 ____.