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If log a (base b) = 4 , log b (base c) = 3 and a = 32c^2, find a,b,c.
Solution
log a (base b) = 4
b^4 = a ....... Eqn *
log b (base c) = 3
c^3 = b ........eqn **
a = 32c^2
From eqn *
b^4 = a, where a =32c^2
b^4 = 32c^2 ....... Eqn 1
Fron eqn **, b= c^3
Subt. This into eqn 1 above,
(C^3)^4 =32c^2
C^12/c^2 = 32
C^10 = 32
C = (2^1/2) = root 2
Put root for c in a= 32c^2
a = 32 *2 = 64
Put 64 for a in eqn *
b^4 = a
b^4 = 64
b = root 8.
Therefore, a = 64, b= root 8 and c = root 2

1. To prove that anything raised to a power of zero is one
2. To prove that 0! = 1

1.
a^x * a^y = a^(x+y)

Let x= 0.

a^0 * a^y = a^o+y

a^0 * a^y = a^y

a^o = a^y /a^y.

a^0 = 1.

2.
Recall that n! = n(n-1)(n-2) * ....*3*2*1
n! = n(n-1)!
If we put n=1.
Then, 1! = 1(1-1)! = 1.0!
So in our factorial notation, de define 0! =1.

Euclid of Alenxandria
Euclid (yōˈklĭd) [key], fl. 300 B.C., Greek mathematician. Little is known of his life other than the fact that he taught at Alexandria, being associated with the school that grew up there in the late 4th cent. B.C. He is famous for his Elements, a presentation in thirteen books of the geometry and other mathematics known in his day. The first six books cover elementary plane geometry and have served since as the basis for most beginning courses on this subject. The other books of the Elements treat the theory of numbers and certain problems in arithmetic (on a geometric basis) and solid geometry, including the five regular polyhedra, or Platonic solids. A few modern historians have questioned Euclid's authorship of the Elements, but he is definitely known to have written other works, most notably the Optics. The great contribution of Euclid was his use of a deductive system for the presentation of mathematics. Primary terms, such as point and line, are defined; unproved assumptions, or postulates, regarding these terms are stated; and a series of statements are then deduced logically from the definitions and postulates. Although Euclid's system no longer satisfies modern requirements of logical rigor, its importance in influencing the direction and method of the development of mathematics is undisputed. One consequence of the critical examination of Euclid's system was the discovery in the early 19th cent. that his fifth postulate, equivalent to the statement that one and only one line parallel to a given line can be drawn through a point external to the line, can not be proved from the other postulates; on the contrary, by substituting a different postulate for this parallel postulate two different self- consistent forms of non-Euclidean geometry were deduced, one by Nikolai I. Lobachevsky (1826) and independently by János Bolyai (1832) and another by Bernhard Riemann (1854). See D. Berlinski, The King of Infinite Space: Euclid and His Elements (2013). The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved. More on Greek mathematician Euclid from Infoplease: geometry: Types of Geometry - Types of Geometry Euclidean geometry, elementary geometry of two and three dimensions (plane and ... number theory - number theory number theory, branch of mathematics concerned with the properties of the integral