–1 votes –1 votes If $7^{3 x}=216$, the value of $7^{-x}$ (rounded off to three decimal places) is _____________. Others gatebt-2023 + – admin asked May 21, 2023 • edited Nov 18, 2023 by makhdoom ghaya admin 2.7k points answer comment Share Follow See all 0 reply Please log in or register to add a comment.