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\(2^x=16\Leftrightarrow2^x=2^4\Leftrightarrow x=4\)

\(2^x=128\Leftrightarrow2^x=2^7\Leftrightarrow x=7\)

b), c) tương tự

d) \(5^{2x}=625\Leftrightarrow5^{2x}=5^4\Leftrightarrow2x=4\Leftrightarrow x=2\)

e) tương tự d

đéo biết đâu lũ ngu đừng hỏi

Giải:

a) câu này mình bó tay, chắc sai đề. không có số nào mũ 3 = 243.

b) 3² x 3^x = 81

=> 3^2+x=81

=> 3^2+x=3⁴

=> 2 + x = 4 => x = 2

c) (2x + 1)⁴=16

=> (2x + 1)⁴=2⁴

=> 2x + 1 = 2

=> không có x nào để thỏa mãn (2x + 1)⁴=16.

d) x²⁰=x => x = {0;1}

a, x^3 = 243

=> x^3 = 7^3

=> x = 7

b, 3^2 . 3^x = 81

=> 3^2x = 3^4

=> 2x =4

=> x = 4

c, (2x + 1)^4 = 16

=> (2x + 1) ^4 = 2^4 = (-2)^4

TH1 : 2x + 1 = 2 

=> 2x = 1

=> x = 1/2

TH2 : 2x + 1 = -2

=> 2x = -3

=> x = -3/2

d, x^20 = x

=> x = 0 hoặc 1

chỉ toàn đc cái copy

  Bài 1:

2^\(x\) = 4

2\(^x\) = 2²

 \(x=2\)

Vậy \(x=2\)

Bài 2:

2\(^x\) = 8

2\(^x\) = 2³

\(x=3\)

Vậy \(x=3\)

Bài 3

2\(^x\) = 16

2\(^x\) = 2⁴

  \(x=4\)

Vậy \(x=4\)

Bo may la binh day k di hieu ashdbfgbgygygggydfsghuyfhdguuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu3

a) x⁸ : x² = 16

x⁶ = 16 = ... ( chỗ này bn xem có số nào mũ 6 = 16 ko nha)

...

b) x³.x².x^-4 = 60

x^3+2-4 = 60

x^-1 = 60 = (1/60)^-1

=> x = 1/60

toi ko co the bt day nh vau ko dau