Tìm x, biết:
a) ( 5x+1)^2+36/49
b) (x-2/9)^3=(2/3)^6
c) (8x-1)^2n+1=5^2n+1
(5x+1)2 = 36/49
(x-2/9)3 = (2/3)6
(8x-1)2n+1= 52n+1
Tìm x, biết:
a) 5x.(53)2=625
b) (5x+1)2=36/49
c) (8x-1)2n+1=52n=1 (n thuộc N)
a.\(\left(\frac{-3}{4}\right)^{3x-1}\)= \(\frac{256}{82}\)
b. ( 5x + 1 ) 2 = \(\frac{36}{49}\)
c. ( 8x - 1 ) 2n + 1 = 5 2n + 1
Tìm x biết
a) 5x . ( 53 )2 = 625
b) ( 5x + 1 )2 =36/49
c) ( 8x - 1 )2n + 1 = 5 2n + 1
CÁC BÀI TOÁN VỀ LŨY THỪA SỐ HỮU TỈ
Tìm x biết:
a, \(\left(5x+1\right)^2=\frac{36}{49}\)
b, \(\left(x-\frac{2}{9}\right)^3=\left(\frac{2}{3}\right)^6\)
c, \(\left(8x-1\right)^{2n+1}=5^{2n+1}\) (n thuộc N) CÁC BN NHỚ GIẢI THEO CÁCH CỦA LỚP 7 NHÉ!!! ^=^
Tìm x,y: (5x+1)^2=36/49=(2y-1)^3
(x-2/9)^3=(2/3)^6=(y/3)^2
(8x-1)^2y+1=5^2y+1 (với y thuộc N)
Tìm x biết :
a, 4.(18 - 5x) - 12.(3x - 7) = 15.(2x - 16) - 6(x + 14)
b, 5.(3x + 5) - 4.(2x - 3) = 5x + 3.(2x + 12) + 1
c, 2.(5x - 8) - 3.(4x - 5) = 4.(3x - 4) + 11
d, (3x + 2)(2x + 9) - (x + 2)(6x + 1) = (x + 1) - (x - 6)
e, (8x - 3)(3x + 2) - (4x + 7)(x + 4)= (2x + 1)(5x - 1) - 33
\(5x-9=5+3x;2^3+0,5x=1,5;\left(5x+1\right)^2=\dfrac{36}{49};\left(\dfrac{-3}{81}\right)^x=-27;2^{x-1}=16\)
