1.tìm x để A nhập giá trị A=x/12
2-x^30+x^28+x^26+.....+x^4+x^2+1/b^28+x^24+x^20+....+x^1+x^4+1
Tính giá trị biểu thức A = x28+x24+x20+...+x8+x4+1 phần x30+x28+x26+...+x4+x2+1 Với x = 5,2399
RÚT GỌN\(\frac{x^{24}+x^{20}+.......+x^4+1}{x^{26}+x^{24}+......+x^2+1}\)
Giai pt:
1/ \(\frac{1}{x^2+9x+20}+\frac{1}{x^2+11x+20}+\frac{1}{x^2+13x+42}=\frac{1}{18}\)
2/ \(\frac{1}{x^2+5x+4}+\frac{1}{x^2+11x+28}+\frac{1}{x^2+17x+70}+\frac{1}{x^2+23x+130}=\frac{4}{13}\)
3/ \(x^2+\frac{4x^2}{\left(x+2\right)^2}=12\)
4/ \(x^3-x^2-\frac{8}{x^3-x^2}=2\)
Phân tích
a)x(x+4)(x+6)(x+10)+128
b)x(x+1)(x+2)(x+3)+1
c)(x-1)(x-3)(x-5)(x-7)-20
d)(x+2)(x+3)(x+7)(x-8)-144
e)(x2+5x+6)(x2-15x+56)-144
f)(x2+6x+8)(x2+6x+8)-24
g)(x2-6x+5)(x2-10x+21)-20
h)(x2-11x+28)(x2-7x+10-72)
Rút gọn phân thức
\(\frac{x^{24}+x^{20}+x^{16} +...+x^4+1}{x^{26}+x^{24}+x^{22}+...+x^2+1}\)
Giải phương trình sau giúp toiii vs :
\(\frac{x-30}{10}+\frac{x-28}{9}+\frac{x-26}{8}\)= - 6
rút gọn phân thức :
Q= \(\frac{x^{10}-x^8-x^7+x^6+x^5+x^4-x^3-x^2+1}{x^{30}+x^{24}+x^{18}+x^{12}+x^6+1}\)
1) (4-3x) (10x-5)=0
2) (7-2x) (4+8x) = 0
3) (9-7x) (11-3x) = 0
4) (7-14x) (x-2) = 0
5) (2x+1) (x-3) = 0
6) (8-3x) (-3x+5) = 0
7) (16-8x) (2-6x) = 0
8) (x+4) (6x-12) = 0
9) (11-33x) (x+11) = 0
10) (x-1/4) (x+5/6) = 0
11) (7/8-2x) (3x+1/3) = 0
12) 3x - 2x^2 = 0
13) 5x + 10x^2 = 0
14) 4x + 3x^2 = 0
15) -8x^2 + x =0
16) 10x^2 - 15x = 0
17) x^2 -4 =0
18) 9 - x^2 = 0
19) x^2 -1 = 0
20) (x-3) (2x-1) = (2x-1) ( 2x+3)
21) (5+4x) (-x+2) = (5+4x) (7+5x)
22) (4+x) (x-5) = (3x-8) (x-5) = 0
23) (3x-8) (7-21x) - (9+2x) (7-21x)
24) (10+ 7x) (x+1) = (9x-2)(x-1)
25) (9x-4) (x-1/2) - (x-1/2) (6+x) = 0
26) 9x^2 - 1 = (3x-1) (x+4)
27) (x+7) (3x+1) = 49-x^2
28) (2x+1)^2 = (x-1)^2
29)x^3- 5x^2+6x = 0
30) 3x^2 + 5x + 2 = 0
Giảii giúpp mìnhh đyy mọii ngườii .
