11. The roots of the quadratic equation 4x3-5v3x + 3 = 0 are O -V3/4, V3 O V3, v3/4 O -V3, -V3/4 O -V3, V3/4 12. The value of k, for which the equation kr(-3) + 9 = 0 has two equal roots, is 09 O 4 O 3 0 5 13- The value of lim log(1 + ar) - , with a # 0, is 5-+0 I O a O log |a O 1/a O 1 14. lim 1 COST - is equal to T O V3/2 1 O 1/2 15. If f (x) = 2x and g(x) = 13 /2 + 1, then which of the following can be a discontinuous function? Of(x)-g(1) Of(x)g(z) Of (x) + g(z) O g(x) / f(z)