(1)a、b为非负数,a+b=1,x1,x2∈R+,求证:(ax1+bx2)(b
题型:解答题
问题:
(1)a、b为非负数,a+b=1,x1,x2∈R+,求证:(ax1+bx2)(bx1+ax2)≥x1x2;
(2)已知实数a,b,c,d满足a+b+c+d=3,a2+2b2+3c2+6d2=5试求a的最值.
(1)a、b为非负数,a+b=1,x1,x2∈R+,求证:(ax1+bx2)(bx1+ax2)≥x1x2;
(2)已知实数a,b,c,d满足a+b+c+d=3,a2+2b2+3c2+6d2=5试求a的最值.