24 th Jr. MATHEMATICS 81+log x V3 T 1 2 3 2 4 69. If f(x) = then f(2007) = TC TC TC log 8 2) VZ 4 2 3 1) log (2007) 2) (2007) log8 3) 8 4) 2007 TT -TC TT TC 3) 3 4 4) 4'3 70. The range of f(x)= 1+\x| is 78. Let N be the set of all natural numbers and 1) (-1,1) 2) [-2,2) 3) (-1,2) 4) (1,2) f:NN be such that 1990 < f (1990)