Calculation: 180 ° - 24 ° 34 ′ 43 ″ + 72 ° 56 ′ 53 ″

Calculation: 180 ° - 24 ° 34 ′ 43 ″ + 72 ° 56 ′ 53 ″

180°-24°34′43″+72°56′53″
=180°+72°56′53″-24°34′43″
=180°+48°22′10″
=228°22′10″

If x square + ax + 1 is multiplied by 2x + B, the coefficient with x square term in the product is 3, and the coefficient with X term is 2, then the value of a + B can be obtained
Urgent, please help to solve the problem, need to solve the process, thank you

（x^2+ax+1）(2x+b)
It is reduced to 2x ^ 3 + (2a + b) x ^ 2 + (2 + AB) x + B
So: 2A + B = 3
2+ab=2
AB = 0
When a = 0, a + B = 3
When B = 0, a + B = 3 / 2

Circle O is the circumscribed circle of △ ABC, and ad is the height on the edge of BC

Extend the intersection circle of Ao to e point
It is known that ∠ CBE = ∠ CAE
Because ∠ CBE + ∠ abd = 90 degree = ∠ abd + ∠ bad, so ∠ CBE = ∠ bad
So ∠ bad = ∠ CAE, ∠ OAB = ∠ bad - ∠ oad = ∠ CAE - ∠ oad = ∠ CAD, that is: ∠ OAB = ∠ CAD

When x = 1, PX ^ 3 + QX + 1 = 2003, then when x = - 1, PX ^ 3 + QX + 1 =?
speed

When x = 1, PX ^ 3 + QX + 1 = 2003
We get: P + Q + 1 = 2003, that is: P + q = 2002
When x = - 1, PX ^ 3 + QX + 1 = - P-Q + 1 = - (P + Q) + 1 = - 2002 + 1 = - 2001

Given that a (1,0), P and Q are two moving points on the circle x ^ 2 + y ^ 2 = 5, AP ⊥ AQ, then the minimum value of PQ is () A.2 B.2 √ 3 C.3 √ 2 D.2 √ 5

[y1/(x1-1)][y2/(x2-1)]=-1y1y2/[(x1-1)(x2-1)]=-1y1y2=-(x1-1)(x2-1)=-(x1x2-x1-x2+1) |PQ|=√[(y1-y2)²+(x1-x2)²]=√(y1²-2y1y2+y2²+x1²-2x1x2+x2²)=√(5-x1²+2x1x2-2x1-2x2+2...

It is known that the expansion of (X & sup2; + ax + 3) (X & sup2; - 3x + b) does not contain the quadratic and cubic terms of X, and the value of algebraic formula B-3A is obtained

[solution]: the original expansion formula is: x ^ 4-3x ^ 3 + BX & sup2; + ax ^ 3-3ax & sup2; + ABX + 3x & sup2; - 9x + 3B = x ^ 4 + (A-3) x ^ 3 + (B-3A + 3) x & sup2; + (ab-9) x + 3B. Because the expansion formula does not contain quadratic and cubic terms about X, the coefficient of quadratic term B-3A + 3 = 0, that is, B-3A = - 3

Rotate quadrilateral a, B, C, d around AD side to get a cube, draw the schematic diagram of the cube, and calculate the volume

It's a cylinder, and the volume is the distance of the area of the bottom circle multiplied by AD

Given the function f (x) = the second power of X + 2mx + m, if f (x) has no zero point, find the value range of real number M

The second power of X + 2mx + M = 0
Discriminant = 4m ^ 2-4m

Given 1 of a + 1 of B = 4, find the value of a + b-3ab of 2A + 2b-7ab

1/a+1/b=4
a+b=4ab
(a+b-3ab)/(2a+2b-7ab)
=(4ab-3ab)/(2*4ab-7ab)
=ab/(ab)
=1

Divide one by two to make one idiom

Divide into two