All categories

3 years ago

Finit set: 1+2+3+........+25=??

Mathematics

2 answers:

yulyashka [42]3 years ago

6 0

Answer:

Finite set: A set is said to be a finite set if it is either void set or the process of counting of elements surely comes to an end is called a finite set.

In a finite set the element can be listed if it has a limited i.e. countable by natural number 1, 2, 3, ……… and the process of listing terminates at a certain natural number N.

The number of distinct elements counted in a finite set S is denoted by n(S). The number of elements of a finite set A is called the order or cardinal number of a set A and is symbolically denoted by n(A).

Thus, if the set A be that of the English alphabets, then n(A) = 26: For, it contains 26 elements in it. Again if the set A be the vowels of the English alphabets i.e. A = {a, e, i, o, u} then n(A) = 5.

Step-by-step explanation:

Veseljchak [2.6K]3 years ago

5 0

1+2+3+4+5+6..........23+24+25=325

You might be interested in

Circle P is representing by the equation (x - 2)^2 + (y + 2)^2 = 9.

Kipish [7]

Circle with the radius 3 (r=3) and the center (2, -2)

5 0

3 years ago

Read 2 more answers

Jamar drove 228 miles and used 6 gallons of gas.

Klio2033 [76]

Step-by-step explanation:

well, it is kind of written already :

228 miles and 6 gallons.

so, miles/gallon = 228/6 = 38 miles/gallon.

it is not mentioned, but I guess we have to assume that he got the same miles/gallon ratio on this trip as well.

so, again

38 miles/gallon

and he used 9 gallons.

so, he drove 38×9 = 342 miles

7 0

3 years ago

The net below can be folded to form a square pyramid.

topjm [15]

Surface area of the square pyramid = 217.8 in²

Solution:

Side length of the square = 9 in

Area of the square = side × side

= 9 in × 9 in

= 81 in²

Area of the square = 81 in²

Perimeter of the base = 4 × 9 in = 36 in

Slant height of the triangle = 7.6 in

Surface area of the square pyramid

$$=\frac{1}{2} \times \text{Perimeter} \times \text{Slant height} + \text{Base area}$

$$=\frac{1}{2}\times 36\times 7.6+81$

$$=136.8+81$

= 217.8 in²

Surface area of the square pyramid = 217.8 in²

6 0

3 years ago

Read 2 more answers

What does -5+3x equals

SCORPION-xisa [38]

Answer:

Step-by-step explanation:

10-10=0

7 0

3 years ago

Read 2 more answers

Please help me answer this. I think that for the first one the answer is A, but I am not sure. There are two parts to the questi

Anika [276]

Vector $PQ=(7-5, 3-4)=(2, -1)$ . $4RS=4 \cdot (4-8, 1-6) = 4 \cdot (-4, -5) = (-16, -20)$ . So the sum is $(-14, -21)$ .

For the second, the magnitude is the square root of the sum of the squares of the components. This is equal to $\sqrt{(-14)^2+(-21)^2} = \sqrt{637}=7\sqrt{13}$ .

4 0

3 years ago

Read 2 more answers