6.56 how much is a 100 fold increase

6.56 how much is a 100 fold increase

Expand 10 times, the decimal point moves one place to the right; expand 100 times, the decimal point moves two places to the right. I hope my answer can help you

How much is 180-55 degrees and 60 minutes

55 degrees 60 minutes = 56 degrees
180°-56°=124°

Find the linear equation of the ellipse x ^ 2 / 9 + y ^ 2 / 4 = 1, which is compared with two points a and B, and the midpoint of the line AB is m (1,1)

Let Y-1 = K (x-1)
y=kx+(1-k)
Bring in the ellipse 4x & sup2; + 9y & sup2; = 36
(4+9k²)x²+18k(1-k)x+9(1-k)²-36=0
x1+x2=-18k(1-k)/(4+9k²)
Abscissa of midpoint = (x1 + x2) / 2
So - 9K (1-k) / (4 + 9K & sup2;) = 1
-9k+9k²=4+9k²
k=-4/9
So 4x + 9y-13 = 0

Solving equation 3x = 45

x＝45÷3
x＝15

Four real number roots of (x2-6x + a) (x2 + 26x + b) = 0 can be arranged to form a group of equal ratio sequence, in which the first term is 1, and the value of a / B can be obtained

A = - 27, B = - 27, a / b = 1

The simple operation of 39.7 × 2.8 + 3.97 × 72 is?

39.7*2.8+3.97*72
=3.97*(28+72)
=3.97*100
=397

If the distance between the point P on the curve y = 4 / X and the line 4x + y + 9 = 0 is the shortest, the coordinates of the point P can be obtained

The slope of the tangent passing through point P and parallel to the line 4x + y + 9 = 0 is y '= - 4 / x ^ 2
And K = - 4, so - 4 / x ^ 2 = - 4
x=(+/-)1
If x = 1, then y = 4
That is, the P coordinate is (1,4)

(- 9) plus (- 19) plus (- 29) plus What is the sum of (- 99)
Come on. Thank you.. If it's fast enough.. Bonus.. We're going to go through the process..

① -9+（-19）+...+（-99)
=-（0+10+20+...90）-9×10
=-450-90
=-540
②-9+（-19）+...+（-99)
=-(10+20+30+...+100)+1×10
=-550+10
=-540
(ask me which one you don't understand)

1. Find the following functions to expand into power series of X, and find the interval where the expansion holds
1,sin^2x 2,(1+x)ln(1+x)

1) Sin ^ 2 x = (1-cos2x) / 2 = 1 / 2-1 / 2 * cos2x = 1 / 2-1 / 2 * [1 - (2x) ^ 2 / 2! + (2x) ^ 4 / 4!... + (- 1) ^ n (2x) ^ 2n / 2n! +..] = x ^ 2-2 ^ 3x ^ 4 / 4!.. - (- 1) ^ n * 2 ^ (2n-1) * x ^ 2n / (2n)! +... The convergence interval is R2) ln (1 + x) = x-x ^ 2 / 2 + x ^ 3 / 3 -. (1 + x) ln (1 + x) = [x-x ^ 2 / 2 + x ^

Why is the square of a minus 2A minus 8 equal to (A-4) (A-2)

It should be the square of a minus 2A plus 8 equals (A-4) (A-2)
In the second year of junior high school, I will learn a formula: (x + b) (x + a) = the square of X + (a + b) x + ab
If you don't understand, you can add that I learned this formula