Question

how to find f(1.5) from a calculator? HELP!

Answer 1

You need to know what the function f represents

Answer 2

what do you mean? that's exactly what I am asking. I mean what the symbol in the calculator?

Answer 3

There is no f symbol in the calculator :D

Answer 4

then how do we calculate it? everyone in my class was doing so. :/

Answer 5

Maybe is that in hexadecimal? need to switch calculator to hex mode

Answer 6

I have a fx-991MS calculator. There's no such mode.

Answer 7

Then that will make it harder.....especially with the 1.5. Can't even find a calculator that will do heximal? points...
could convert from hex back to decimal the f is easy that is a 15
one is just one...but fractions I don't see much on the web on fractions but it might mean .8??? so in decimal maybe and I do mean maybe it means 15 * 1.8 = 27 convert back to hex and get 1B????
But that is pretty sketchy. I tried 2 calculators here at home and neither of them will do fractional hex. And if your class is doing hex/octa/binary conversions a calculator with those modes is gonna be kind of important.

Answer 8

hmm I don't know why you're taking the hexadecimal? I don't think its relevant. I think you didn't understand my question. I need to find the function of (1.5). That's it. I am pretty sure most of the students the sa,e calculator as mine. So there's another way out I suppose.

Answer 9

except f(1.5) is not a function. It is part of a function but there has to be more after the f(x) part

Answer 10

Well the question is:
\[f(x)=x-1/x ^{2}+1\]

Answer 11

So in order to find f(x) we input x= 1.5,1.1,1.01,1.001 etc etc.

Answer 12

hehe ok then to solve the function for f(1.5) replace each of the x's with 1.5

(1.5)-1/(1.5)^2 +1 .....

Answer 13

that looks like you are using a table to find a limit?

Answer 14

LOL Ohhh okayyyy. Yeah I guess so. Our prof. called it the calculator method lol

Answer 15

Thanks, buddy.

Answer 16

yay

Answer 17

so ya just enter the different values into the equation wherever there is an x. I'll do a simpler function x+2 but in the values for x and write down the answer

1.5 + 2 =3.5
1.1 + 2 =3.1
1.01 + 2 =3.01

and you will see the answers get closer and closer to some value in this case 3 so the limit as x -> 1 f(x)=x+2 is 3

Answer 18

and one last thing if you are still looking at this you will have three parts to this function the limit that x is approaching, the f(x) part and then the equation part

Answer 19

hey if you're there, do you know what we will do if lim x approaches to \[\Pi\]