Let fx=x2-1, 0≤x<112, 1≤x≤2 and gx=2x+1x-k+3, x≥0. Then g(f(x)) is continuous at x = 1 if 12k rs equal to ______
gfx=gx2-1, 0≤x<1g12, 1≤x≤2 =x-1x-2-2k2+3, 0≤x<14-2k, 1≤x<2 limx→1- gfx=3, gf1=4-2kand limx→1+ gfx=4-2kfor gfx ot be continuous at x=1, 4-2k=3 or k=12.