已知f(x)=ax++2-2a(a>0)在图象在点(1,f(1))处的切线与直线y=2x+1平行. (1)求a,b满足的关系式; (2)若f(x)≥2lnx在[1,+∞)上恒成立,求a的取值范围; (3)若a=1,数列{an}满足a1=2,an+1=f(an)+2-an(n∈N*),求证:a1?a2?a3…an=n+1. |
与“已知f(x)=ax+bx+2-2a(a>0)在图象在点(1,f(1))处的切线与直线y=2x+1平行.(1)求a,b满足的关系式;(2)若f(x)≥2lnx在[1,+∞)上恒成立,求a的取值范围;(3)若a=1,数列{an}满足”考查相似的试题有: