Question

若实数a b满足3根号（a-1）+5丨b丨=7,S=2根号（a-1）-3丨b丨,求W=15S+2的最大值和最小值

Answer 1

设u=√(a-1)>=0,v=|b|>=0,由3√(a-1)+5|b|=7得u=(7-v)/3>=0,∴0