F (x) = - 3x square + 2, what is the function, is it a non odd non even function

F (x) = - 3x square + 2, what is the function, is it a non odd non even function

Even function

1 the minimum value of quadratic function y = f (x) is 4, and f (0) = f (2) = 6, find the analytic formula of F (x). 2 it is known that f (2x + 1) = 3x + 2, find f (5) 3 it is known that f (x) is a quadratic function, and satisfy 3f (x + 1) - 2F (x-1) = 2x + 17, find the analytic formula of F (x). 4 it is known that f (x) = x + 2 and G (x) = 5x + 2 under the root sign, find f (3), f (a + 1), f (x + 2) and G (x) = 5x + 2, F (g (x)) and find the domain of the function y = f (g (x)). As long as I can see how to do it;

1. The minimum value of quadratic function y = f (x) is 4, and f (0) = f (2) = 6
F (0) = f (2) = 6 indicates that the axis of symmetry is x = 1, and the minimum value is 4, so the vertex is (1,4), let the vertex formula be
Y = a (x-1) &# 178; + 4; substituting (0,6) points, the solution is a = 2
2. Finding f (5) when f (2x + 1) = 3x + 2 is known
Because f (2x + 1) = 3x + 2
So f (5) = f (2 × 2 + 1) = 3 × 2 + 1 = 7
3. It is known that f (x) is a linear function and satisfies 3f (x + 1) - 2F (x-1) = 2x + 17. The analytic expression of F (x) is obtained
Let f (x) = ax + B, then f (x + 1) = a (x + 1) + B, f (x + 1) = a (x-1) + B
Substituting the original formula 3A (x + 1) + 3b-2a (x-1) - 2b = 2x + 17
ax+5a+b=2x+17
Compare the left and right coefficients, so a = 25A + B = 17, a = 2, B = 7
4. Given the function f (x) = root x + 2 and G (x) = 5x + 2, find f (3), f (a + 1), f (g (x))
And find the domain of the function y = f (g (x))
f（3）=√(3+2)=√5
f（a+1）=√(a+1+2)=√(a+3)
f（g（x））=f(5x+2)=√(5x+2+2)=√(5x+4)
F (g (x)) = √ (5x + 4), so 5x + 4 ≥ 0, so the domain is [- 4 / 5, + ∞)

It's better to have a process f (x) = x * + 4x + 3, f (AX + b) = x * + 10x + 24. Find 5a-b =
("*" for square)

f(x)=x²+4x+3 ,f（ax+b）=(ax+b)²+4(ax+b)+3=a²x²+2abx+4ax+b²+4ab+3=x²+10x+24a²=1 2ab+4a=10b²+4ab+3=24a=1 b=3a=-1 b=-7 5a-b= 2

Xiaojun, Xiaoming, Xiaogang, Xiaoqiang and Xiaohao compete in table tennis, and each of them has to compete for one game,
Xiao Gang played two games and Xiao Qiang played one game. How many games did Xiao Hao play? Who did he play with? (hint: try connecting)

Xiaojun and - --- Xiaoming, Xiaoqiang, Xiaogang, xiaohaobi, a total of four games, Xiaohao once
Xiaoming and --- Xiaoqiang, Xiaogang, xiaohaobi, a total of three games, Xiaohao once
Xiaogang and -------- Xiaoqiang, xiaohaobi, a total of two games, Xiaohao once
Xiaoqiang compared with Xiaohao,
To sum up, Xiaohao compared with Xiaojun, Xiaogang, Xiaoming and Xiaoqiang in four games

China's economy is not as strong as Japan's

China's economy was not as strong in Japan
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Conversion of angle, minute and second
42.34 ° equals () degrees () minutes () seconds?
Could you be more detailed? `I'm so stupid that I still don't understand the conversion of minutes and seconds! `

42.34 degrees are divided into 42 degrees + 0.34 degrees
0.34 * 60 = 20 + 0.4 points
0.4 min = 0.4 * 60 = 24 s
So 42.34 degrees = 42 degrees 20 minutes 24 seconds
If you get a decimal, you can continue to multiply it by its base. Are you also from Hengyang?

A sealed rectangular glass can is 30 cm long, 18 cm wide and 12 cm high. When it is placed horizontally, the water depth inside is 9 cm. When it is placed laterally, the water depth is less than 10 cm?
Write arithmetic

22.5cm
Total volume of water = 30x18x9 = 4860
On the side, the water depth is 4960 △ 18 △ 12 = 22.5

It is known that the fourth power of x plus six times the second power of x plus x plus 12. There is a factor that is the second power of x plus a times x plus 4. Find the value of a and other factors of this polynomial

X ^ 4 + 6 * x ^ 2 + X + 12 = (x ^ 2 + X + 3) * (x ^ 2-x + 4) so a = - 1 analysis idea is that the original formula has no X-cube term, so the coefficient of the first term of another factor X is - A, and because the constant of the original formula is 12, the constant of another factor is 3, and then a = - 1 is obtained according to the coefficient of x-square term

A rectangular piece of land, 120 meters long, width ratio 13. How many square meters is the area of this land?

120 × (120-120 × 13), = 120 × 80, = 9600 square meters; a: the area of this land is 9600 square meters

What are the main elements of composition?

The beginning: narrates the time, place and event; the middle: the process of the event; the end: feeling. The end must be closed