My sister needs some help with her math homework, and I can't do math for the life of me, so someone help the poor kid out...lol. Here's the question:
Given f(x)= k(2+x), find k if f-1(-2)= -3.
2006-10-12 13:18:04 · 4 answers · asked by Anonymous in Education & Reference ➔ Homework Help
I asked her to check the question again, and this is what she put:
f( x ) = k(2+x), find k if f ^ -1(-2)= -3
I guess the "^" symbol is "to the power of..."...so it's:
f(x) = k(2+x), find k if f to the power of -1(-2) = -3.
2006-10-12 13:25:56 · update #1
I just asked my brother and this is what he told me.
f(x) = 2k+xk
f-1 = k
k = -3
f(x) = 3(2+x)
2006-10-12 13:21:32 · answer #1 · answered by Poncho Rio 4 · 0⤊ 0⤋
I'm assuming the "f-1(-2) = -3" means "inverse" ... that is, the -1 looks like an exponent. If that's true, this is the same as saying that f(-3) = -2. That might start her on the right track.
2006-10-12 20:24:46 · answer #2 · answered by dmb 5 · 0⤊ 0⤋
sum not clearly worded
2006-10-12 20:20:38 · answer #3 · answered by raj 7 · 1⤊ 0⤋
your "sister" huh? :-)
2006-10-12 20:21:54 · answer #4 · answered by I ♥ AUG 6 · 0⤊ 1⤋