103. If n is the slope of a tangent to the curved = 1+x?, then 2. mj> hm> c.m>-1 dms1 4. If at each point of the curve y=x-ax+x+1, the tangent is inclined at an acute angle with the positive direction of the r-axis, then a. a>0 TV 3 d None of these 5. The slope of the tangent to the curve y= V4-xat the at where the ordinate and the abscissa are equal, is