Please solve 19th one:

1   9 .   If   f o x   = x / x + 1   and   f n + 1 = f 0   0   f n   f o r   n   =   0 , 1 , 2 , . . . . . . . . ,   t h e n   f n x   i s   - A   x n + 1 x + 1                               B   f 0 x                                       C   n x n x + 1                                   D   x n x + 1

f0x=xx+1=x0+1x+1f1x=f0 0 f0x=f0f0x=xx+1xx+1+1=xx+1x+x+1x+1=x2x+1=x1+1x+1f2x=f0 0 f1x=f0f1x=x2x+1x2x+1+1=x2x+1x+2x+12x+1=x3x+1=x2+1x+1f3x=f0 0 f2x=f0f2x=x3x+1x3x+1+1=x3x+1x+3x+13x+1=x4x+1=x3+1x+1Following the pattern we havefnx=xn+1x+1

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