If a is an even number, what are three consecutive odd numbers represented by the formula containing a Hurry!

If a is an even number, what are three consecutive odd numbers represented by the formula containing a Hurry!

a+1,a+3,a+5

12+14+18+116+132+164+1128+1256+1512+11024=______ ．

12+14+18+116+132+164+1128+1256+1512+11024=1-12+12-14+14-18+… +1512-11024 = 1-11024 = 10231024, so the answer is: 10231024

One and two percent plus two and six percent plus three and twelve percent plus four and twenty percent plus What's nine and one in 90?

1+1/1-1/2
+2+1/2-1/3
+3+1/3-1/4 + .
=1+2+3+...9+1/1-1/10 =45+9/10

If a ≠ B is known and the square of a is - 3A + 1 = 0 and the square of B is - 3B + 1 = 0, the value of a + B can be obtained?

Do you see the relationship between the square of a - 3A + 1 = 0 and the square of B - 3B + 1 = 0?
In fact, a and B can be regarded as the two real roots of the equation x's Square - 3x + 1 = 0
Solve the equation x squared - 3x + 1 = 0, the solution is X1 = 3 / 2 plus 5 under the root sign, X2 equals 3 / 2 minus 5 under the root sign (solved by formula method)
Then a + B is actually equal to X1 + x2
You figure it out for yourself. I'll figure it out for 3
This topic our teacher talked about, so it should be correct
I can't find some mathematical symbols. I hope you can understand them

The image is parallel to the line y = - 2x - 7 and intersects with the line y = 1 / 4x + 3 at the same point on the Y axis
Such as the title

Let the linear function be y = KX + B because it is parallel to y = - 2x-7
So k = - 2
The line y = 1 / 4x + 3 intersects Y axis at (0,3)
So B = 3
Then the linear function is y = - 2x + 3

The least common multiple (1) of 42 and 66 is obtained by decomposing the prime factor. 42 = () times () times ()
66 = () times () times ()
(2) The common quality factors of 42 and 66 are (); the unique quality factors of 42 are (); the unique quality factors of 66 are ()
(3) The least common multiple of 42 and 66 is ()

（1） 42=2×3×7,66=2×3×11
(2) The common quality factors of 42 and 66 are 2 and 3; the unique quality factor of 42 is 7; the unique quality factor of 66 is 11
(3) The least common multiple of 42 and 66 is 462

Finding the minimum value of a ^ 2 + 1 / AB + 1 / a (a-b)

Because 1 / a (a-b), a is not equal to Ba ^ 2 + 1 / AB + 1 / a (a-b) = a ^ 2 + {(a-b) + B} / AB (a-b) = a ^ 2 + 1 / b (a-b). Then, let A-B = y, the square of B = X1 / XY + (x + y) = x ^ 2 + y ^ 2 + 2XY + 1 / XY be greater than or equal to 2XY + 2XY + 1 / xy = 4xy + 1 / XY be greater than or equal to 4 (basic inequality: A ^ 2 + B ^ 2

Let f (x) = g (x) (x-a) ^ n, G (x) has n-1 order continuous derivative at x = a, find the n order f (x) at x = a
Use Leibniz formula, and then why is the term K = 0 in the sum non-zero, not all zero?

f(x)=g(x)(x-a)^n
Using Leibniz formula:
The (n-1) order derivative of F (x) = the (n-1) order derivative of G (x) (x-a) ^ n
=Σ (n = 0, n-1) C (n-1, K) [k-order derivative of G (x)] [(n-1-k) order derivative of (x-a) ^ n]
When k = 0: = g (x) (x-a) ^ n (n-1) order derivative = g (x) n! (x-a)

39*148/149+148*86/149+148*24/149
This / is the fraction line, the front is the numerator, the back is the denominator, please answer this question quickly!

=(39+86+24)*148/149
=149*148/149
=148

What's the difference between three times of three fifths minus half of the reciprocal of five eighths?

3/5*3-(1/5/8)/2
=9/5-4/5
=1