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goldfiish [28.3K]
4 years ago
12

1. If 28^3*32^n=28^3, what is n? How do you know?

Mathematics
1 answer:
Vladimir79 [104]4 years ago
6 0

Answer:

1. n=0  2. x = 15 and 3.   m = -5

Step-by-step explanation:

1.   28^3*32^n = 28^3

Divide both sides by 28^3:-

32^n = 1

n = 0    ( any number to the power 0 = 1)


2.   30^x * 30^5 = 30^20

divide both sides by 30^5

30^x = 30^15

because the 2 bases are the same ( both = 390) we have:-

x = 15

3.    a^m * a^3 = 1 / a^2

a^m * a^3 = a^-2

Divide both sides by a*3

a^m = a^-5

so m = -5

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