11 + 22 + ( \(x\) x 2 + \(x\) x 199 ) : 33 = 123 x 123
33 + \(x\) ( 2 + 199) : 33 = 15129
201\(x\) : 33 = 15129 - 33
201\(x\) : 33 = 15096
201\(x\) = 15096 x 33
201\(x\) = 498168
\(x\) = 498168 : 201
\(x\) = 166056/67
123 x 123 x123 x 123 x123 x123 : 123567
Ai giải được chắc thiên tài
11 x 11 = 4
22 x 22 = 16
33 x 33 = ?
Tính A = (15/22 - 1/11) : 1/33 - (1/14 - 2/21) : 1/35 + 1 + 1/5 x (1/4 - 1/6 - 1) x 5/11
123/56*3-12+65/12*22+11-22*22/33/5*123=? khó lắm
Chứng minh rằng:
A = 1/3 + 1/32 + 1/33 + ..........+ 1/399 < 1/2
B = 3/12x 22 + 5/22 x 32 + 7/32 x 42 +............+ 19/92 x 102 < 1
C = 1/3 + 2/32 + 3/33 + 4/34 +.........+ 100/3100 ≤ 0
5 . x + 11 = 9 - x
5. (x + 4/11) = x - 2/22
\(2^{x+22}-4^{x+11}=0\)
1)x^3-16x
2)x^4-2x^3
3)(2x-11)(x^2-1)
4)x^3-36x
5)2x+19
Tìm x:
A)4^x+1+4^0=65
B)2^x+2^x+4=144
C)(7^x-11)^3=2^5.5^2+200
D)45^x.45^123=45^126
