`lim_(x->1) (x^(2/3) -2 (x^(1/3)+1))/((x-1)^2)` is equal to

lim_(x->0) (x^2-3x+1)/(x-1)

lim_(x-1)(tan(x^(2)-1))/(x-1) is equal to

lim_(x to 1//2) (8x^(3) - 1)/(16 x^(4) - 1) is equal to

lim_(x to 1//2) (8x^(3) - 1)/(16 x^(4) - 1) is equal to

lim_(x rarr1)(3sqrt(7+x^(3))-sqrt(3+x^(2)))/(x-1) is equal to

lim_(x rarr1)((x^(4)+x^(2)+x+1)/(x^(2)-x+1))^((1-cos(x+1))/((x+1)^(2))) is equal to 1 (b) ((2)/(3))^((1)/(2))(c)((3)/(2))^((1)/(2))(d)e^((1)/(2))