It is known that there is a point a (2,0) B (1,1) on the square of the curve y = 2x-x, and the slope of the tangent passing through point a

It is known that there is a point a (2,0) B (1,1) on the square of the curve y = 2x-x, and the slope of the tangent passing through point a

The derivation of the formula: y = 2-2x, substituting x = 2 into the solution to get y = - 2, so the tangent slope passing through point a is - 2

If f (x) = the square of G (x) + X, the tangent equation of the curve y = g (x) at point (1, G (1)) is y = 2x + 1, then the tangent slope of the curve y = f (x) at point (2, f (2))

The title is incomplete and uncertain
Tangent equation of curve y = g (x) at point (1, G (1))
y-g(1)=g'(1)(x-1)
We obtain y = g '(1) x + G (1) - G' (1) = 2x + 1
G (1) = 3, G '(1) = 2
There are many g (x) that meet this condition
g(x)=x^2+2,g(x)=2x+1
Different G (x) leads to different f '(2)

If the tangent slope of parabola y = x2 + X-2 at point m is 3, then the coordinate of point m is______ ．

The parabolic equation is f (x) = x2 + X-2, f '(x) = 2x + 1. Set the point m (x0, Y0), from the geometric meaning of the derivative, f' (x0) = 2x0 + 1 = 3, the solution is x0 = 1 ∧ Y0 = 12 + 1-2 = 0, and the point m (1,0), so the answer is: (1,0)

6+10+14+…… +398+402

(402-6) △ 4 + 1 = 396 △ 4 + 1 = 100 items
6+10+14+…… +398+402
=（6+402）x100÷2
=408x50
=20400
If you don't understand this question, you can ask,

Questions: (1) 56,28,16,4 are 24 points. (2) 1,9,4,2 are 24 points
And (3) on the number axis, the number represented by point C is y. when point C is in what integer position, the minimum value of Y + 1 + Y-3? And find out the minimum value. (4) a commodity first increases its price by 25%, and then decreases its price by 45%. What is the current price percentage of the original price? (5) specify the new operation ∧ a ∧ B = a ∧ 178; - B ∧ 178; + (a-b), then what is the result of 10 ∧ 5?

1、-（-56）-28+（-16）/4=24
2、（9-1-2）*4=24
3. When y

[5.6-5.6 * (5.6-5.60)] / 56 clever calculation

【5.6-5.6*(5.6-5.60】/56
=【5.6-5.6*(5.60-5.60】/56
=【5.6-5.6*0】/56
=5.6/56
=1/10

Simple calculation: 1 / 30 + 1 / 42 + 1 / 56 + 1 / 72=
emergency

=1/5×6+1/6×7+1/7×8-1/8×9
=1/5-1/6+1/6-1/7+1/7-1/8+1/8-1/9
=1/5-1/9
=4/45

How to calculate (28 + 56) × 15 / 2

First calculate the brackets in addition and subtraction 84 * 15 / 2 = 1260 / 2 = 630

56 / 48 = () (formula calculation)

7.56/48 = 0.1575

7.56/48 = () how to calculate?
7.56/48 = () how to calculate?

First, about 2 = 28 / 24, then about 4 = 7 / 6