Question

[vinh tran]

A)2^x-1=64   b)3^2x-10=81    c)2^2x+3=1024 d) 618-3^x+1=24.5^2

Answer 1

[Ngụy Vô Tiện]

a, 2^x-1 = 64

=> 2^x-1 = 2⁶

=> x - 1 = 6

=> x = 6 + 1 

=> x = 7

b, 3^2x-10 = 81

=> 3^2x-10 = 3⁴

=> 2x - 10 = 4

=> 2x = 14

=> x = 7

c, 2^2x+3 = 1024

=> 2^2x+3 = 2¹⁰

=> 2x + 3 = 10

=> 2x = 7

=> x = \(\frac{7}{2}\)