SOLUTION: If p = -2, then which of the following is true? A. p^ -17 < p^ -18 < p^ -19 B. p^ -19 < p^ -17 < p^ -18 C. p^ -19 < p^ -18 < p^ -17 D. p^ -17 < p^ -19 < p^ -18 E. p^ -18 < p

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: If p = -2, then which of the following is true? A. p^ -17 < p^ -18 < p^ -19 B. p^ -19 < p^ -17 < p^ -18 C. p^ -19 < p^ -18 < p^ -17 D. p^ -17 < p^ -19 < p^ -18 E. p^ -18 < p      Log On


   



Question 1132407: If p = -2, then which of the following is true?
A. p^ -17 < p^ -18 < p^ -19
B. p^ -19 < p^ -17 < p^ -18
C. p^ -19 < p^ -18 < p^ -17
D. p^ -17 < p^ -19 < p^ -18
E. p^ -18 < p^ -19 < p^ -17

Found 2 solutions by MathLover1, greenestamps:
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

If p+=+-2, then which of the following is true?
A.
p%5E+-17+%3C+p%5E+-18+%3C+p%5E+-19
%28-2%29%5E+-17+%3C+%28-2%29%5E+-18+%3C+%28-2%29%5E+-19
1%2F%28-2%29%5E+17+%3C+1%2F%28-2%29%5E+18+%3C+1%2F%28-2%29%5E+19
1%2F-131072+%3C+1%2F262144+%3C+1%2F-524288=> False

B.
+%28-2%29%5E+-19+%3C+%28-2%29%5E+-17+%3C+%28-2%29%5E+-18
1%2F%28-2%29%5E+19+%3C+1%2F%28-2%29%5E+17+%3C1%2F%28-2%29%5E+18
1%2F-524288+%3C+1%2F-131072+%3C+1%2F262144=>False


C.

p%5E+-19+%3C+p%5E+-18+%3C+p%5E+-17
1%2F%28-2%29%5E+19+%3C+1%2F%28-2%29%5E+18+%3C+1%2F%28-2%29%5E+17
1%2F-524288%3C+1%2F1%2F262144+%3C+1%2F-131072=>False

D.

+p%5E+-17+%3C+p%5E+-19+%3C+p%5E+-18
%28-2%29%5E+-17+%3C+%28-2%29%5E+-19+%3C%28-2%29%5E+-18+
1%2F%28-2%29%5E+17+%3C+1%2F%28-2%29%5E+19+%3C1%2F%28-2%29%5E+18+
1%2F-131072+%3C+1%2F-524288+%3C1%2F262144+=>True


E.
+p%5E+-18+%3C+p%5E+-19+%3C+p%5E+-17
+%28-2%29%5E+-18+%3C+%28-2%29%5E+-19+%3C+%28-2%29%5E+-17
+1%2F%28-2%29%5E+18+%3C+1%2F%28-2%29%5E+19+%3C+1%2F%28-2%29%5E+17
+1%2F262144+%3C+1%2F-524288+%3C+1%2F-131072=>False

so, your answer is: D



Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


With p = -2, p^-17 and p^-19 are negative and p^-18 is positive. So p^-18 is largest, so the answer is either B or D. We need to determine whether p^-17 < p^-19 (answer D) or p^-19 < p^-17 (answer B).

-2%5E%28-17%29+=+-%281%2F2%5E17%29
-2%5E%28-19%29+=+-%281%2F2%5E19%29

In absolute value, 1/2^19 is smaller than 1/2^17; so with them both negative -1/2^19 is "less negative" than -1/2^17.

So -2^(-17) is less than -2^(-19), and so the answer is D.