If the integer n satisfies the quadratic power of (n-2012) + the quadratic power of (n-2014) = 4, find the value of n

If the integer n satisfies the quadratic power of (n-2012) + the quadratic power of (n-2014) = 4, find the value of n

(n-2012) & # 178; + (n-2014) & # 178; = 4 (n-2012) & # 178; + (n-2012-2) & # 178; = 4 (n-2012) & # 178; + (n-2012) & # 178; - 4 (n-2012) + 4 = 4 (n-2012) & # 178; - 2 (n-2012) = 0 (n-2012) (n-2012-2) = 0n = 2012 or n = 2014

If the tangent slope of the curve y = e ^ - x at x = x0 is e under the root sign, then x0=
It's about derivative. Try to have process

Y '= - e ^ - x = - E = - e ^ 0.5 under root sign
x=-0.5

Given a + B = - 8, ab = 12, then (a-b) 2 = 1___ ．

(a-b) 2 = (a + b) 2-4ab ∵ a + B = - 8, ab = 12, the original formula = (- 8) 2-4 × 12, = 64-48, = 16

In the plane rectangular coordinate system, O is the origin of the coordinate. Given the points a (4,0), B (3,6), C (0,3), find the area of the quadrilateral 0abc
If the area of the quadrilateral oapc is equal to the area of the quadrilateral oabc, is AC parallel to BP?

Through B as BD ⊥ X axis in D,
S quadrilateral oabc = s trapezoid ODBC + s Δ abd
=1/2(3+6)×3+1/2×6×1
=13.5+3
=16.5.
Your idea is right
When BP ‖ AC, s Δ ACB = s Δ ACP,
S quadrilateral oapc = s quadrilateral oabc

8 / 9-4X = 1 / 9 (solving equation)

8 / 9-4X = 1 / 9
8-4x=1
-4x=-7
X = 7 / 4

Let A1, A2, A3 be three-dimensional column vectors, matrix A = (A1, A2, A3) and | a | = 1, B = (a1 + A2 + a3, a1 + 2A2 + 4A3, a1 + 3a2 + 9A3) determinant =?
Isn't it 18? Don't you think it's the same determinant to multiply a number to another row? When only one row is multiplied by a number, is the determinant also multiplied by that number? Then only the second row is multiplied by 2, and the third row is multiplied by 9? (it doesn't matter whether a row is a row, but it's actually a column),

B=（a1+a2+a3,a1+2a2+4a3,a1+3a2+9a3)=A*(1 1 1)=|A|*|1 1 1|=~~~
1 2 3 1 2 3
1 4 9 1 4 9

7x + 9 = 0, what is x?

7X+9=0,
7X=-9
X=-9/7

Find the probability that the absolute value of the mean difference of two independent samples with the capacity of 10 and 15 is greater than 0.3

Let x1,... X10, Y1,... Y15 respectively
It is required that P {| ~ x - ~ y | > 0.3} = 1-p {| ~ x - ~ y}|

If (x + 3) (x + 5) = x2 MX + N, then M + n
（x+3）（x-5）=x²-mx+n

The solution of ∵ (x + 3) (x + 5) = x & # 178; - MX + n ∵ (x + 3) (x + 5) = 0 is the solution of X & # 178; - MX + n = 0 ∵ X1 = - 3, X2 = - 5 is x & # 178; - MX + n = 0 is known from the relationship between root and coefficient: - 3-5 = M = - 8, n = (- 3) × (- 5) = 15m + n = - 8 + 15 = 7. If you are satisfied, please click [satisfied]; if you are

If the two diagonal lines AC and BD of the isosceles trapezoid ABCD are vertical and the median line EF is equal to 8, what is the area of the trapezoid
Why/

Solution: in ladder ABCD, ab = DC, EF is the median line, and the intersection of AC and BD is o
When on is done through O, BC is perpendicular to N and ad is perpendicular to m, Mn is perpendicular to the top and bottom of trapezoid
Then both amo and BNO are isosceles right triangle
Then Mo = am = 1 / 2ad, on = BN = 1 / 2BC
So Mn = 1 / 2 (AD + BC) = EF = 8
Existing area = EF * Mn = 64