Let g be continuous on [1,2] with the following values:
g(1)≈−0.281,g(1.5)≈1.481,g(2)≈4.389.
After evaluating g at the midpoint 1.5 of the original interval [1,2], which closed subinterval is guaranteed to contain a zero of g?
a) [1,1.5]
b) [1.5,2]
c) [1,2]
d) [1.25,1.5]