We know the equation 3x + 2y-4 + 3ax-2by = 0 for X and Y. (1) if there is no X term, find the value of a; (2) Ruo Write down the formula and the answer,

We know the equation 3x + 2y-4 + 3ax-2by = 0 for X and Y. (1) if there is no X term, find the value of a; (2) Ruo Write down the formula and the answer,

The equation 3x + 2y-4 + 3ax-2by = 0 can be written as (3 + 3a) x + (2-2b) y-4 = 0;
(1) If there is no X term, then 3 + 3A = 0, a = - 1;
(2) If there is no y term, then 2-2b = 0, B = 1

Please write the formula directly. We haven't learned to set X and Y in the third grade
If the width of a rectangle is increased by 4cm, its area will be increased by 32cm, which is exactly a square. Find out the area of the original rectangle and draw a picture

The length of rectangle is: 32 △ 4 = 8 (CM)
Width: 8-4 = 4 (CM)
Area: 8 × 4 = 32 (square centimeter)
Don't draw the picture. There is no software

It is known that the intersection of straight line y = KX and hyperbola x ^ 2 / A ^ 2 - y ^ 2 / b ^ 2 = 1 (a > 0, b > 0) is at two points of M.N
P is a point on a hyperbola different from M. n, if a straight line PM.PN If the product of the slopes of the hyperbola is 1 / 3, then the eccentricity e of the hyperbola is

Let P (x0, Y0, y = KX, y = KX (x, x, y = KX, y = KX, y = KX (x, x, y = KX, y = KX, y = KX and the hyperbola equation, x = ± AB / (x = ± AB / (b \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\35;178; = 1

123456789 = 100 fill in a plus sign and two minus signs anywhere between them to make them equal

123-45-67+89=100
I hope my answer is right

On quadratic function and quadratic equation of one variable
If there are two and only one of them is between 0 and 1 (excluding 0 and 1), then the value range of a is?

f(0)0
or
f(0)>0,f(1)0
a>3

Recursive equation, multiplication sign, division sign, plus sign, minus sign - copy and fill in
1 9.88÷4×3.12－7.5
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2 13.6×3.12＋50.8
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3 6.75×5.1－4.2
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4 （3.3＋1.5）×4.6－7.89
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5 14.3＋1.75×4
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6 8.65－7.5×4.78
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Please do help

1 9.88÷4×3.12－7.5＝2.47×3.12-7.5＝7.7064-7.5=0.20642 13.6×3.12＋50.8 ＝42.432+50.8＝93.2323 6.75×5.1－4.2＝34.425-4.2＝30.2254 （3.3＋1.5）×4.6－7.89＝4.8×4.6-7.89＝22.08-7.89=14.195 14.3＋1.7...

What is the common factor between the quadratic power of a-2ab + the quadratic power of B and the square of A-B?

a^2-2ab+b^2=(a-b)^2
a^2-b^2=(a+b)(a-b)
So it's a-b

In the regression linear equation y = a + BX, B denotes?

It represents the average change value of dependent variable y when the independent variable x changes by one unit of measurement. Mathematically, it is called the slope of straight line, also known as regression coefficient

This is a definite integral problem about high school mathematics
A car moving at a constant speed at the speed V is the distance S = VT after time T. If the car moving in a straight line with a variable speed at the time t is v = 2 + T & sup2;, then how much distance does it travel during the period of 1 ≤ t ≤ 2? This is the related knowledge of trapezoidal area with curved edges in senior two mathematics. I hope to give the exact answer

The interval [1,2] is divided into n cells equally, and the i-th cell is 1 + i-1n, 1 + in
∴Δsi＝f1＋i－1n•1n.
sn＝i＝1nf1＋i－1n•1n
＝1ni＝1n 1＋i－1n2＋2
＝1ni＝1n (i－1)2n2＋2(i－1)n＋3
＝1n3n＋1n2[02＋12＋22＋… ＋(n－1)2]＋1n[0＋2＋4＋6＋… ＋2(n－1)]
＝3＋(n－1)(2n－1)6n2＋n－1n.
s＝limn→∞sn＝limn→∞ 3＋(n－1)(2n－1)6n2＋n－1n＝13/3.
The distance traveled during this period is 13 / 3km

11 out of 18 = 1 out of 3 + 1 out of 8 + 1 out of 9 + 13 out of 30 = 1 out of 5 + 1 out of 6 + 1 out of 15?

I want to ask if you mean basic training or practice and testing