\(\Leftrightarrow4^{x+1}=4^{3x}\\ \Leftrightarrow x+1=3x\\ \Leftrightarrow2x=1\\ \Leftrightarrow x=\dfrac{1}{2}\)
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\(\Leftrightarrow4^{x+1}=4^{3x}\\ \Leftrightarrow x+1=3x\\ \Leftrightarrow2x=1\\ \Leftrightarrow x=\dfrac{1}{2}\)
1) \(4^{x+1}=64^x\)
2) \(\dfrac{x}{2}-\dfrac{x}{5}=1+x\)
(x-1)x+2=(x-1)x+4
1/ 4 . 2/6 . 3/8 . 4/10 . 5/15 .... 30/62 . 31/64= 2x
(1/2)^x + (1/2)^x+4 = 17/64
Tìm x:
a, (-3 / 4) ^ 3x-1 = -27 / 64
b, (4/5) ^ 2x+5 = 256 / 625
c, (x+3) ^5 / (x+2) ^2 = 64 / 27
d, x-1 / x+5 = 6/7
tính (1/4) x (2/6) x (3/8) x (4/20) x (5/12) x...x (31/64) = 2x
a)64^x : 16^x = 256
b)-2401/7^x = -7
c)64/(-4)^x = -256
(23 : 4) X 2x +1 =64
Hốn số 4 1/3:x/4= 6 :0,3
1/4 x 2/6 x3/8 x 4/10 x 5/12 x....x 30/62 x 31/64=2n. Tìm n
tim x biet [(4/20/21-5):(41/42-1):...:(63/64-1)].x=-128