let f(x) is less than 3 for all points in [2,4]Originally Posted bySusie38

hence integral of f(x)dx from 2 to 4 will be less than integral of 3dx from 2 to 4

but integral of 3dx from 2 to 4 is 6

which contradicts the condition

actully f(x) should be greater than 3.5 for some c if it is changing with x