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Proofs

Proof means sufficient evidence to establish the truth of something. It is obtained from deductive reasoning, rather than from empirical arguments. Proof must show that a statement is true in all cases, without a single exception.

1,294 Questions

Are not congruence theorems or postulates?

Putting a question mark at the end of a few words does not make it a sensible question. Please try again.

State and prove the sampling theorem?

If the signal is bandwidth to the fm Hz means signal which has no frequency higher than fm can be recovered completely from set of sample taken at the rate

How do you calculate the center of a rectangular parallelepiped?

It is the point of intersection of its three main diagonals.

Does a parallelogram bisect?

Usually, a parallelogram with not bisect other shapes.

How do you find volume using displacement?

You can find volume by using displacement:

  1. The way you can do this is by filling up a beaker of a graduated cylinder or other measuring device with water.
  2. You drop some water in there and then you record how much you dropped. Then you put an object in making sure the object is completely submerged.
  3. The water will rise, and you record how much it rose, in Units of Volume (cm3).
  4. Then you subtract how much water you put in with the rise of the water when the object was put in.
  5. And that's how you find volume by displacement.

Is blue a number?

No, it's a color.

On the contrary, everything is numbers:

University of Kentucky blue is:

Pantone Coated stock: 286 C

Pantone Uncoated stock: 286 U

CMYK: 100, 66, 0, 2

RGB: 0, 93, 170

HEX: #005DAA

Everything is numbers.

State and give proof for Maclaurin's theorem?

Maclaurin's theorem is a special case of Taylor's theorem, which approximates a function as a power series around the point (x = 0). It states that if a function (f) is (n)-times differentiable at (0), then it can be expressed as:

[ f(x) = f(0) + f'(0)x + \frac{f''(0)}{2!}x^2 + \ldots + \frac{f^{(n)}(0)}{n!}x^n + R_n(x) ]

where (R_n(x)) is the remainder term given by (R_n(x) = \frac{f^{(n+1)}(c)}{(n+1)!}x^{n+1}) for some (c) between (0) and (x). The proof involves showing that the remainder term approaches zero as (x) approaches zero, thereby demonstrating that the series converges to (f(x)) around (0).

What are Elisha S Loomis' proofs?

Loomis was an American teacher and is famous for publishing, in 1940, a book entitled "The Pythagorean Proposition" which contained 370 different proofs of Pythagoras's theorem. The proofs are not his but from mathematicians over the centuries. The book contains a proof by Euclid, by the Indian mathematician, Bhaskara, by ancient Chinese, as well as by more modern mathematicians such as Legendre, Leibniz, and Huygens and by a former president of the United States, James Garfield. There are also several proofs discovered by high school students.

How do you prove that bijective function also has a bijective inverse?

We know that f:A~B is a bijection

Therefore f^-1:A~B is a unique function

To prove that f^-1 is one-one--

Let b1, b2 be any 2 different elements of B ,, i.e

b1 is unequal to b2

Now we have to prove that

f^-1(b1) is unequal to f^-1(b2)

Let f^-1(b1)=a1. And. f^-1(b2)=a2

Such that a1,a2 €A

Then b1= f(a1) and b2=f(a2)

~f^-1(b1) is unequal to f^-1(b2)

Therefore f^-1 is a one-one function

Now f^-1 has a n image a such that

b€B

Therefore f^-1 is onto function

Finally f^-1 is a bijection

Hence proved

How do you prove triangle congruence?

There are several different ways and the answers depend on what is known about the triangles.

Why is the square root of 2 an irrational number?

By way of contradiction, suppose sqrt(2) is rational. Then there exist integers n and d such that sqrt(2) = n/d. We can also assume (without loss of generality) that n and d have no common factors, like writing the fraction in lowest terms. Multiplying both sides by d, and then squaring both sides, gives 2d2 = n2. Every integer can be written as a power of 2 times an odd number, so write n = 2ia and d = 2jb, where a and b are odd. Plugging into the previous equation gives 22j+1b2 = 22ia2. Since a2 and b2 must be odd, they must be equal, and hence 2j+1 = 2i. This is impossible; an odd integer cannot equal an even integer. Therefore the original assumption must be false, namely sqrt(2) is an irrational number.

Is every permutation always a one-to-one function?

By definition, a permutation is a bijection from a set to itself. Since a permutation is bijective, it is one-to-one.

How do you divide fractions when both fractions are negative?

A negative number divided by a negative number is positive. Therefore, it's the same as if both fractions were positive.

Prove that a group of order 5 must be cyclic?

There's a theorem to the effect that every group of prime order is cyclic. Since 5 is prime, the assertion in the question follows from the said theorem.

Which one is better rajasthan board or CBSE board..?

Obviously Cbse because in this you can score marks easily and its central so you get job easier than r.b.s.e

What is pumping lemma?

pumping lemma states that any string in such a language of at least a certain length (called the pumping length), contains a section that can be removed, or repeated any number of times, with the resulting string remaining in that language.

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