Thread: Evaluate this function

evaluate this function F(x)= 2[[x+7]]-8 at the indicated values:

i) f(3)
ii) f(-3.3)
iii) f(3/4)

i dont know why when i plug in ii) and iii) i dont get the right answer. when i plug in i) f(3) i get 12 which is the correct answer for that values but the other two is way off. what should i do?

Originally Posted by refresh

evaluate this function F(x)= 2[[x+7]]-8 at the indicated values:

i) f(3)
ii) f(-3.3)
iii) f(3/4)

i dont know why when i plug in ii) and iii) i dont get the right answer. when i plug in i) f(3) i get 12 which is the correct answer for that values but the other two is way off. what should i do?

, so and

Originally Posted by redsoxfan325

, so and

i dont understand how [[3.7]] is 3?

Is that not the greatest integer (floor) function?

Originally Posted by redsoxfan325

Is that not the greatest integer (floor) function?

ok so for [[3/4+7]] would that be 4????