F (x) is integrable in [a, b], integral upper limit function Φ (x) is continuous, why, how to prove?

F (x) is integrable in [a, b], integral upper limit function Φ (x) is continuous, why, how to prove?

F (x) continuous?

College mathematics analysis problem: prove the function f (x), when x = 0, f (x) = 0; when 0

The interval [0,1] is divided into [1 / N, 1 / n-1], n is listed from 2, and 0 is listed separately. Then f (x) is a piecewise linear function with values from 0 to 1, and each segment is a linear function with a range of 0 to 1, so each segment is integrable

The product of the square of the polynomial ax plus NX minus one and x minus two is to find the value of n with respect to the hierarchical binomial of X

Cubic binomial, if it is:
(ax^2+nx-1)(x-2)=ax^3+(n-2m)x^2-(2n+1)x+2
Because it is a cubic polynomial, a is not equal to 0, and because it is a binomial and 2 is not equal to 0, n-2a = 0 and 2n + 1 = 0
Solution
n=-1/2
a=-1/4

The original price of a color TV set is 2000 yuan. If the price is increased by 20% first and reduced by 20%, the current price of this color TV set will be reduced

2000 × (1 + 20%) × (1-20%) = 1920 yuan
Isn't the problem very simple?

The side area of a cylinder is 188.4dm2, and its bottom radius is 2DM. What is its height?

188.4 ÷ (2 × 3.14 × 2) = 188.4 ÷ 12.56 = 15 (decimeter) a: its height is 15 decimeters

How to remove the sign of absolute value?
I'm getting dizzy,

If the number in the absolute value is negative, change the sign. For example, if the number in the absolute value is positive, it will come out directly

1+1-4+6-8+45-5+8-3+8-34+8-2+8-23+8-3+8-789+679-567+56-79+67-8967+96-79+678=?

-8 886

(- 0.125) ÷ 9 / 8 = -____ (- two and two fifths) = three and three fourths

(- 0.125) △ 9 / 8 = [9] / (- 2 / 5) = - 3 / 4

General score: 1 / A ^ 2-4, 1 / A ^ 2-4a + 4

1 / A ^ 2-4, 1 / A ^ 2-4a + 41 / (a + 2) (A-2), 1 / (A-2) & # 178;; common denominator (a + 2) (A-2) & # 178;; (A-2) / (a + 2) (A-2) & # 178;, (a + 2) / (a + 2) (A-2) & # 178;; I'm glad to answer for you, skyhunter 002 will answer for you. If you don't understand this question, you can ask

22+42+62+…… +402=(

an=a1+(n-1)d
402=22+(n-1)x20
n=20
Sn=(a1+an)n/2=（22+402）20/2=4240
Knowledge point: the general formula of high school arithmetic sequence is: an = a1 + (n-1) d arithmetic sequence summation formula Sn = Na1 + n (n-1) d / 2;