It is known that the solutions of the equations a1x + b1y = C1, a2x + b2y = C2 are x = 3, y = 2 Go! Go! Go! Wait online! Then the solution of A1 (x + 1) + 2b1y = 3c1, A2 (x + 1) + 2b2y = 3c2 is

It is known that the solutions of the equations a1x + b1y = C1, a2x + b2y = C2 are x = 3, y = 2 Go! Go! Go! Wait online! Then the solution of A1 (x + 1) + 2b1y = 3c1, A2 (x + 1) + 2b2y = 3c2 is

x=4,y=4/3

Using Cauchy inequality to prove: (a1 + A2 +...) +an)/n

Equivalent to
(a1+a2+a3+...an)^2

-Factorization of a2b2 + 2a2b-a2

﹣a²b²＋2a²b－a²
＝﹣a²(b²－2b＋1)
＝﹣a²(b－1)²

Nine tenths (5 / 9 + 25 / 21 * 7 / 15) can be easily calculated

Nine tenths (5 / 9 + 25 / 21 * 7 / 15)
=9/10÷（5/9+5/9）
=9/10÷ 10/9
=81/100
If you don't understand this question, you can ask,

Given TaNx = sin (x + 2 π), then the value of SiNx is?

TaNx = sin (x + 2 / 2 π)
That is, TaNx = cosx
sinx/cosx=cosx
sinx=cos²x=1-sin²x
sin²x+sinx-1=0
Because - 1

For square and circle with equal perimeter, the ratio of side length to radius is______ ：______ The area ratio is______ ：______ ．

The ratio of side length to radius is: C4 ／ C2 π = C4 × 2 π C = π 2, the ratio of area is: (C4) 2 ／ [π × (C2 π) 2] = c216 ／ [π × C24 π 2] = c216 ／ C24 π = c216 × 4 π C2 = π 4, answer: the ratio of side length to radius is π: 2, the ratio of area is π: 4

How can 12, 5, 7, 2 be equal to 24

12 * 5-7 * 2-12 * 2 + 2 = 24 sample!

Let the sum of the first n terms of the sequence {an} be Sn, let TN = (S1 + S2 + S3 +...) +SN) / N, TN is called sequence A1, A2 The ideal number of a, an a100
If the ideal number of is 101, then the sequence 2, A1, A2 What is the ideal number of A100

Let A1, A2 If the sum of the first n terms of A100 is Sn, then its ideal number is (S1 + S2 +...) +S100)/100=101S1+S2+… +Sn = 100 × 101 sequence 2, A1, A2 The ideal number of A100 is (2 + 2 + S1 + 2 + S2 +) +2+S100)/101=(2×101+S1+S2+… +S100)/101=(2×101+100×101)/101=102...

The perimeter of the square is 32cm. Can you find the area of the parallelogram?

32 △ 4 = 8 (CM), area: 8 × 8 = 64 (cm 2). Answer: the area of parallelogram is 64 cm 2

1 x of 3 + 1 of 2 = 2 of 42 5 / (3 of 4 + 2 of 5)

x=39/20