Question

[Hiếu Nè]

bài 2:tìm x, biết:

a. x + 1^3 = 2^5 - ( -1^3 )

b. 3^7 - x = 1^4 - ( -3^5 )

Answer 1

[Trúc Giang]

a) \(x+1^3=2^5-\left(-1^3\right)\)

\(\Rightarrow x+1=33\)

=> x = 32

b) \(3^7-x=1^4-\left(-3^5\right)\)

\(\Rightarrow2187-x=1+243=244\)

=> x = 1943

Answer 2

[Lê Trang]

a) \(\Leftrightarrow x+1=32+1\)

\(\Leftrightarrow x=32\)

Vậy x = 32

b) \(\Leftrightarrow2187-x=1+243\)

\(\Leftrightarrow2187-x=244\)

\(\Leftrightarrow x=1943\)

Vậy x = 1943