Posted by **Monique** on Sunday, May 11, 2008 at 5:19pm.

For all real numbers, f(x)=(x^2+1)/2. If f(a)=25 and f(11)=b, what could be the value of b-a?

I'm confused on how you do these problems. Can someone show me how to do them? Thanks much!

- Math -
**bobpursley**, Sunday, May 11, 2008 at 6:01pm
I will start you on b

f(11)=(11^2+1)/2=61 so b is 61

25=(a^2+1)/2 solve for a....

- Math -
**Monique**, Sunday, May 11, 2008 at 6:13pm
Ok, so f(25)=(25^2+1)/2. 626/2=313. So, a=313. When substituted, 61-313 is -252.

There's a small issue though. This question is multiple, and I don't see a -252 as one of the choices:

a. -14

b. 36

c. 68

d. 77

e. 86

Did I do something wrong?

## Answer this Question

## Related Questions

- Algebra 2 Could use help asap - I really am trying to work these problems out ...
- math - describe the solutions of 4<or=n+2 mult. choice a all real numbers ...
- algebra can someone help my buddy ray out - identify the vertex and the axis of...
- Algebra (need help ASAP!!!!) - I didn't get how to do the problem. In my book it...
- Algebra (need help ASAP!!!!) - I didn't get how to do the problem. In my book it...
- Algebra 2 - 3. Identify the vertex and the axis of symmetry of the graph of the ...
- Math - Assume that f is a continuous function from the real numbers to the real ...
- algebra - Find the domain and range of the function. 1. f(x)= x^2-x I got: ...
- math - can someone please explain this to me i am confused and dont know what to...
- math - what is the range of the relation below? ((1,2)(3,4)(5,6)(7,8)) a)all ...

More Related Questions