Question

Tìm x,y biết: \(\frac{x}{y^2}=16\)và \(\frac{x}{y}=64\)

Answer 1

Ta có ; \(\frac{x}{y^2}=16\Rightarrow\frac{x}{y}.\frac{1}{y}=16\)

Mà \(\frac{x}{y}=64\)

Nên : \(64.\frac{1}{y}=16\)

\(\Rightarrow\frac{1}{y}=\frac{16}{64}=\frac{1}{4}\)

=> y = 4

Nên x = 64 x 4

=> x = 256

Vậy x = 256 ; y = 4 

Answer 2

x=256

y=4

Answer 3

X=16.y²

16.y²/y=64 => y=64/16=4

X=16.4²=256