Математика. Числительные. Аристова В.М. - 41 стр.

UptoLike

ВУЗ: 

БФУ им. Канта | Калининград

Составители: 

Рубрика: 

41
2 + b + √6 + b
4
= 160 — is read: two plus b plus the sqare root of six plus b to the
fourth power is equal one hundred and sixty.
The identity is an equality, valid at all admissable values of its variables.
The identities are read:
a + b = b + a — a plus b equals b plus a;
sin
2
x + cos
2
x = 1 — sine squared x plus cosine squared x is equal to one.
Arithmetical and Geometrical Progressions.
Арифметическая и геометрическая прогрессии.
An arithmetical progression is a sequence such as 3, 5, 7, 9 …, in which each
member differs from the one in front of it by the same amount.
A geometrical progression is a sequence such as 3, 6, 12, 24 …, in which each
member differs from the one in the same ratio. "The number of families holidaying
abroad grew now in geometrical progression".
Mathematicians more often use now the expressions arithmetic sequence and
geometric sequence.
Reading formulae.
Чтение формул.
a ÷ b = c
a divided by b is equal to c
2 × 2 = 4
twice two is four
c × d = b
c multiplied by d equals b
dx differential of x
ab
ab
+
−
=
cd
cd
+
−
a plus b over a minus b is equal to c plus d over c minus d
y
a-b
· x
b-c
= 0 y sub a minus b multiplied by x sub b minus c is equal to zero
dy
ds
2
2
+[1 + b(s)]y = 0
the second derivative of y with respect to s plus y times open
bracket one plus b of s in parentheses, close bracket is equal
to zero
∫ ƒ(x) dx the integral of ƒ(x) with respect to x 
     2 + b + √6 + b4 = 160 — is read: two plus b plus the sqare root of six plus b to the
fourth power is equal one hundred and sixty.
     The identity is an equality, valid at all admissable values of its variables.
     The identities are read:
     a + b = b + a — a plus b equals b plus a;
     sin2x + cos2x = 1 — sine squared x plus cosine squared x is equal to one.


                        Arithmetical and Geometrical Progressions.
                   Арифметическая и геометрическая прогрессии.
     An arithmetical progression is a sequence such as 3, 5, 7, 9            , in which each
member differs from the one in front of it by the same amount.
     A geometrical progression is a sequence such as 3, 6, 12, 24            , in which each
member differs from the one in the same ratio. "The number of families holidaying
abroad grew now in geometrical progression".
     Mathematicians more often use now the expressions arithmetic sequence and
geometric sequence.


                           Reading formulae. Чтение формул.
a÷b=c                           a divided by b is equal to c
2×2=4                           twice two is four
c×d=b                           c multiplied by d equals b
dx                              differential of x
a+b c+ d                        a plus b over a minus b is equal to c plus d over c minus d
   =
a−b c− d
ya-b · xb-c = 0                 y sub a minus b multiplied by x sub b minus c is equal to zero
d 2y
     +[1 + b(s)]y = 0           the second derivative of y with respect to s plus y times open
ds 2
                                bracket one plus b of s in parentheses, close bracket is equal
                                to zero
∫ ƒ(x) dx                       the integral of ƒ(x) with respect to x


                                                    41

Страницы