f(x) = √x ? 10
I think this ? is - sign
so f(t) = squarert(t) - 10 = u
so suqarert(t) = u+10
ot t= (u+10)^2
f(x)=x-10
This topic has expert replies
Source: Beat The GMAT — Problem Solving |
-
gian-28
- Newbie | Next Rank: 10 Posts
- Posts: 5
- Joined: Tue Jul 03, 2007 12:37 pm
- Location: switzerland
The function f is defined by f(x) = √x – 10 for all positive numbers x. If u = f(t) for some positive numbers t and u. What is t in terms of u?
If u = f(t) for some positive numbers t and u, then u= √t – 10. now we'll have to solve for t.
u^2=t-10
u^2+10=t... which is what E tells us.
I hope that's easier to read and I hope it's correct
If u = f(t) for some positive numbers t and u, then u= √t – 10. now we'll have to solve for t.
u^2=t-10
u^2+10=t... which is what E tells us.
I hope that's easier to read and I hope it's correct
