Which one of the following is not true for all nonzero numbers a and b and any integer n?
A. (1/a)^-1 = a
B. (a/b)^0 = 1
C. a^-n = 1/a^n
D. (-1/b0^-n = b^n
2007-02-22 03:59:44 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
D is the answer. All the others are true.
I believe you meant to type (-1/b)^-n, which when evaluated is (b/-1)^n. Notice that if n is an even number, then (-1/b)^-n = b^n/1 = b^n. If n is odd, it is equal to (b^n)/-1 = -(b^n), because -1 to any odd power is -1. So (-1/b)^-n is not always equal to b^n.
2007-02-22 04:19:15 · answer #1 · answered by MathBioMajor 7 · 0⤊ 0⤋
My brain just seized up!
2007-02-22 12:02:18 · answer #2 · answered by Anonymous · 1⤊ 0⤋
sorry im not a wiz
2007-02-22 12:02:21 · answer #3 · answered by Martha Diana B 2 · 0⤊ 0⤋
D
2007-02-22 12:09:16 · answer #4 · answered by Bailey 5 · 0⤊ 0⤋