(1) y=(x-1)/(x+2),x属于[1,3],求最大值 (2) y=x/(x^2+1),x(1) y=(x-1)/(x+2),x属于[1,3],求最大值(2) y=x/(x^2+1),x属于[1,2],求最大值(3) y=(x+1)/(x^2+1),求值域(4)y=x^2+1/(x^2+4)+5,求最值

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(1) y=(x-1)/(x+2),x属于[1,3],求最大值 (2) y=x/(x^2+1),x(1) y=(x-1)/(x+2),x属于[1,3],求最大值(2) y=x/(x^2+1),x属于[1,2],求最大值(3) y=(x+1)/(x^2+1),求值域(4)y=x^2+1/(x^2+4)+5,求最值
(1) y=(x-1)/(x+2),x属于[1,3],求最大值 (2) y=x/(x^2+1),x
(1) y=(x-1)/(x+2),x属于[1,3],求最大值
(2) y=x/(x^2+1),x属于[1,2],求最大值
(3) y=(x+1)/(x^2+1),求值域
(4)y=x^2+1/(x^2+4)+5,求最值

(1) y=(x-1)/(x+2),x属于[1,3],求最大值 (2) y=x/(x^2+1),x(1) y=(x-1)/(x+2),x属于[1,3],求最大值(2) y=x/(x^2+1),x属于[1,2],求最大值(3) y=(x+1)/(x^2+1),求值域(4)y=x^2+1/(x^2+4)+5,求最值