Question

K

求解

S1
6
x 4²
O = H₂ X ₂ ² X 4 <- z P X ₂D (69
√-A
解
類題 3 設方程式 4+z-33x2-2+1=0,則x=

Answer 1

✨ 最佳解答 ✨

綾

原式 = 2^(2x+1) - 33*2^(x-2) + 1
= 2*(2^x)^2 - (33/4)*(2^x) + 1
=> 8*(2^x)^2 - 33*(2^x) + 4 = 0
=> [8*(2^x) - 1][(2^x) - 4] = 0
=> 2^x = 1/8 or 4
=> x = -3 or 2