Mom, what do you say in English?

mother.mom

I think English is very interesting

I think English is very interesting
I feel English is very interesting.
=
I think English is very funny.

1. Through the left focus F1 of the ellipse X & # 178 / 2 + Y & # 178; = 1, make a straight line L with an inclination angle of 60 degrees. The straight line L intersects the ellipse at two points a and B, and calculate the length of ab

In the ellipse x ^ 2 / 2 + y ^ 2 = 1, a = √ 2, B = 1, C = 1, left focus F1 (- 1,0)
The linear equation of 60 ° inclination angle is y = √ 3 (x + 1)
Substituting into the elliptic equation, we get x ^ 2 + 2 * 3 (x + 1) ^ 2 = 2
--->7x^2+12x+4=0
--->x1,x2=(-6+'-2√2)/7
y1,y2=3(x+1)=3(1+'2√2)/7=(3+'-2√6)/7
|AB|^2=(x2-x1)^2+(y2-y1)^2
=（4√2/7）2+（4√6/7）2
=128/49
∴|AB|=8/7*√2

The original price of a commodity is 200 yuan. After 15% increase, the price will be reduced by 15%
A. Greater than B. less than C. equal to

200 × (1 + 15%) × (1-15%) = 200 × 115% × 85% = 230 × 85% = 195.5 (yuan) 195.5 ＜ 200 answer: the current price is less than the original price

What is 12 + 99?

I'm glad to answer your question
12+99
=12+（100-1）
=111

Chicken and rabbit in the same cage
There are several chickens and rabbits in the cage, with a total of 112 feet. After 10 rabbits are caught from the cage, the chickens and rabbits in the cage are exactly the same. How many chickens and rabbits are there in the cage?
OK, thank you very much. You must come out before 8 o'clock tonight!
Never learned binary once

10x4 = 40
112-40 = 72
72 / (1 + 2) = 24
Chicken: 24 / 2 = 12
Rabbits: (112-24) / 4 = 22

Find the solution and thinking of a math problem
If you multiply 2 / 3, 4 / 7 and 8 / 9 by the same score, the product is an integer. What's the minimum score? Alas, I'm so sorry for the math genius who answered for me just now. Somehow, I lost the answer. I'm so sorry. Please don't let me die and save me as soon as possible. If the answer is good, I'll tell you about a hilarious incident that happened to me

The integer, that is, the denominator part, is 1, which satisfies two conditions
The numerator of this fraction is an integer compared with 3, 7 and 9 of the upper denominator, that is, the common multiple n * (3 * 7 * 9);
The denominator of 2,4,8 of the numerator is an integer, that is, the common divisor is 1,2;
Then the smallest one takes 3 * 7 * 9 with the smallest numerator part = 63 and 2 with the largest denominator part, namely 63 / 2

92934763572424646087388611094384111008997
929347635724646087388611094384 * 11 * 100 * 89 * 97 calculate with an advanced calculator

8.825363953128162*10^38

What are the polysyllabic characters of Hai in Yantai

The first natural section
The second natural section
The third natural section
The fourth is natural calculation
The fifth natural section
The sixth natural section

The gate of a factory is shown in the figure, in which the quadrilateral ABCD is a rectangle, and the upper part is a semicircle with ab as the diameter, in which ad = 2.3m, ab = 2m. There is a truck full of goods, 5m, 1.6m wide. Can this car pass through the gate? Explain the reason

Take the midpoint o of AB (i.e. the center of the semicircle with ab as the diameter) as the center of the circle, draw an arc with 1.6/2 radius, intersect with ab at e and f respectively, cross e as the vertical line of AB, intersect with semicircle at g, connect og, then in △ Geo
GE²=OG²-OE²=(2/2)²-(1.6/2)²=1-0.64=0.36
Ge = √ 0.36 = 0.6 (m)
AD + Ge = 2.3 + 0.6 = 2.9 (m)
That is, when the truck passes through the factory gate in the middle, the height from the ground on both sides of the truck to the top of the gate is 2.9 meters, which is 2.5 meters higher than the height of the truck, so the truck can pass through the factory gate

Mom, what do you say in English?