5^72x0.04^35+(﹣3/11)^2010x(11/3)^2011
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5^72x0.04^35+(﹣3/11)^2010x(11/3)^20115^72x0.04^35+(﹣3/11)^2010x(11/3)^20115^72x0.04^35+(﹣3/11)^2010x
5^72x0.04^35+(﹣3/11)^2010x(11/3)^2011
5^72x0.04^35+(﹣3/11)^2010x(11/3)^2011
5^72x0.04^35+(﹣3/11)^2010x(11/3)^2011
5^72x0.04^35+(﹣3/11)^2010x(11/3)^2011
=25^36x0.04^35+(﹣3/11)^2010x(11/3)^2010×(11/3)
=25×(25×0.04)^35-(-3/11×11/3)^2010×(11/3)
=25×1-1×11/3
=64/3
去分母
yx²+2yx+3y=1-2x
yx²+(2y+2)x+(3y-1)=0
x是实数则方程有解
判别式大于等于0
4(y²+2y+1)-4(3y²-y)>=0
-2y²+3y+1>=0
2y²-3y-1<=0
(3-√17)/4<=y<=(3+√17)/4
值域[(3-√17)/4,(3+√17)/4]