【题目】 求本题的答案和解析,谢谢1.用洛必达法则求下列极限(1) lim_(x→0)(sinax)/(sinbx)(b≠q0)snb(2 lim_(x→0)(tanx)/(tan3x)- tan3r(3) lim rln.r(4) lim_(x→0)(e^x-e^(-x)-2x)/(sinx)sinr(5)lim_(x→0)(1/x-1/(e^x-1))⑥ lim_(x→1)(x/(x-1)-1/...