\lambda_ap_a^t+\lambda_bp_b^t+\lambda_cp_c^t\geq 2^t\sqrt{\lambda_a\lambda_b\lambda_c}\left(\frac {d_a^t} {\sqrt{\lambda_a}}+\frac {d_b^t} {\sqrt{\lambda_b}}+\frac {d_c^t} {\sqrt{\lambda_c}}\right)