\(8^{13}-9.8^{12}+9.8^{11}-9.8^{10}+.....-9.8^2+9.8-2\)
\(=8^{13}-\left(8+1\right).8^{12}+\left(8+1\right).8^{11}-\left(8+1\right).8^{10}+....-\left(8+1\right).8^2+\left(8+1\right).8-2\)
\(=8^{13}-8^{13}-8^{12}+8^{12}+8^{11}-8^{11}-8^{10}+....-8^3-8^2+8^2+8-2\)
\(=\left(8^{13}-8^{13}\right)-\left(8^{12}-8^{12}\right)+\left(8^{11}-8^{11}\right)-....-\left(8^2-8^2\right)+8-2\)
\(=8-2=6\)
`x^13-9x^12+9x^11-9x^10+....-9x^2+9x-2`
với ` x=2024`
F=x^13-9x^12+9x^11-9x^10+.....-9x^2+9x-2 với x=8
Tính giá trị biểu thức trên 1 cách hợp lý
Giải pt sau
\(\dfrac{1}{\text{x}^2+5x+6}\)+\(\dfrac{1}{\text{x}^2+7x+12}\)+\(\dfrac{1}{x^2+9x +12}\)+\(\dfrac{1}{\text{x}^2+9x+30}=\dfrac{1}{8}\)
A=\(\frac{|x+10|}{x^4+9x^3-9x^2+9x-10}\)
tìm điều kiện và rút gọn B
Rút gọn
a) (6x-2)2+(2+5x)2+4x(3x-12)x(2-5x)
b) (9x3+3x+1)x(9x3-3x+1)-(9x3+12)
x2 (9x3 +8x -8/9) = 9x.... +3+8x2.... -8/9x....
= 9x ..... +8x ..... -8/9 x.....
giúp mik
a) (x – 2)(x2 + 2x + 4) – x( x2 +2) = 12 b) (x – 3)2 – (x+2)(x–2) = 16
c) x3 – 9x = 0 d) x3 – 6x2 + 9x – 54 = 0
giúp e vs ạ
Giải phương trình :
a. \(\frac{2}{x-14}-\frac{5}{x-13}=\frac{2}{x-9}-\frac{5}{x-11}\)
b.\(\frac{12x+1}{6x-2}-\frac{9x-5}{3x+1}=\frac{108x-36x^2-9}{4.\left(9x-1\right)^2}\)
MN giups mik nha
a) 7-2x=22-9x
b) x-12+4x=25+2x-1
c) 11+8x-3-5x-3x+x
d) 3-4y+24+6y-y+27-3y
e)8x-3-9x+12
f) x+2x+3x-19-9x+3x
g) 4-2x+15-9x+4-2x
