1- m=√<span><span><span><span><span>−2</span>3</span></span>n</span>+<span><span><span>173</span></span></span></span> or m=<span>−<span>√<span><span><span><span><span>−2</span>3</span></span>n</span>+<span><span><span>173</span></span></span></span></span></span>