2012 Tianjin Question 6 Single-choice Differentiating 2012_天津卷 (2012·文) 6.(2012•天津)下列函数中,既是偶函数,又在区间(1,2)内是增函数的为( ) A. $y=cos2x$,x∈RB. $y=log2|x|$,x∈R且x≠0C. $y=$D. $y=x 3+1$,x∈R Answer keyB ☆ SaveCan't do it, show the explanation查看原卷 →