Let f (x) = 2x + 3, G (x + 2) = f (x), then what is the expression of G (x)?

Let f (x) = 2x + 3, G (x + 2) = f (x), then what is the expression of G (x)?

g(x+2)=f(x)=2x+3=2(x+2)-1
g(x)=2x-1

Let f (x) = 2x + 3, G (x + 2) = f (x), find the expression of G (x)
Let f (x) = 2x + 3, G (x + 2) = f (x), find the expression of G (x)

g(x+2)=2x+3
g(x+2)=2(x+2)-1
The rule of G is to multiply by two and subtract by one
g(x)=2x-1

Let f (x) = 2x + 3, G (x + 3) = f (x), the expression of G (x) should be explained in detail

G (x) = f (x) = 2 (x + 3) - 3. G (x) = 2x-3

Given the function f (x) = 3 (x-1) / 2, if the sequence an satisfies a (n + 1) = f (an) · A1 = 2 (1), find an (2); if BN = (an) ^ 2 + 2, find the minimum term of the sequence {BN}
Given the function f (x) = 3 (x-1) / 2, if the sequence an satisfies a (n + 1) = f (an) · A1 = 2
(1) Find an (2) if BN = (an) ^ 2 + 2, find the minimum term of the sequence {BN}
Which expert helps next. The head is big

(1) F (x) = 3 (x-1) / 2, a (n + 1) = f (an), so a (n + 1) = 3 (an-1) / 2, then a (n + 1) - 3 = 3 / 2 * (an-3), the sequence {an-3} constitutes an equal ratio sequence, the first term is a1-3 = - 1, and the common ratio is 3 / 2. So an-3 = - (3 / 2) ^ (n-1) an = - (3 / 2) ^ (n-1) + 3. (2) BN = (an) ^ 2 + 2, let (3 / 2) ^ (n-1) = t, BN = (-...)

The taxi charge standard of a city is: 9 yuan within 3 kilometers, 2.5 yuan per kilometer for the distance beyond 3 kilometers. Xiaoying and her father take a taxi from home to the railway station, paying 21.5 yuan in total. How many kilometers is the distance from Xiaoying's home to the railway station?

It's 9 yuan within 3 km, but if you use 21.5 yuan, it's definitely more than that. 1 uses 21.5 yuan to reduce 9 yuan, and then use 12.5 yuan under your body △ 2.5 yuan, soeasy

As shown in the figure, ab ∥ DC, ab = 7cm, BC = CD = 4cm in right angle trapezoid ABCD. Take the straight line where AB is as the axis to rotate for one circle to get a geometry and calculate its full area

In ∵ RT △ AOD, Ao = 7-4 = 3cm, OD = 4cm, ∵ ad = 42 + 32 = 5cm, ∵ the surface area of the obtained geometry is π × 4 × 5 + π × 4 × 2 × 4 + π × 4 × 4 = 68 π cm2. Therefore, its total area is 68 π cm2

If x power of 10 = 20, y power of 10 = 5 to - 1, try to find x power of 9 to 2Y power of 3

The (X-Y) power of 10 is 100, that is, X-Y = 2, so the original formula is the fourth power of 3 = 81

After an old man died, he left a legacy to his three children. The property of the eldest one was half of that of the other two. The property of the eldest two was one third of that of the other two. The property of the eldest three was 12000 yuan. Q: how much is the property left by the old man?

Let the eldest and the second get X and Y yuan respectively
2x=y+12000
3y=x+12000
The simultaneous solution is x = 9600. Y = 7200
So the old man left x + y + 12000 = 9600 + 7200 + 12000 = 28800 yuan

It is known that the diagonals of the parallelogram ABCD intersect at point O, the perimeter is 48, and the perimeter of △ AOD is 4cm more than that of △ BOC. The length of AB and BC can be obtained

The circumferences of AOD and BOC are equal
Do you have the wrong title

We know that a * 4 / 3 is equal to 11 / 12 * B is equal to 15 / 15, and A.B.C is not equal to 0

The question is: 3A / 4 = 12b / 11 = 15C / 15, compare a, B, C
a. B and C are multiplied by a positive number and then equal. Then the bigger the tree, the smaller the tree!
It can be seen that the coefficients of a, B and C are 0.75 and 1.0909 respectively 、1.
Then a is the largest and B is the smallest