Question

giá trị x<o 

thỏa mãn x⁴=6,25²

Answer 1

x^4=6,25^2

x^4=39,0625

x^4=2,5^4

=>x=2,5

đug tk mik nha

Answer 2

\(x^4=6,25^2< =>\orbr{\begin{cases}x=\sqrt[4]{6,25^2}\\x=-\sqrt[4]{6,25^2}\left(loai\right)\end{cases}}< =>x=\sqrt{6,25}=2,5\)

Answer 3

nhầm,làm lại:

\(x^4=6,25^2< =>\orbr{\begin{cases}x=\sqrt[4]{6,25^2}\\x=-\sqrt[4]{6,25^2}\end{cases}}< =>\orbr{\begin{cases}x=\sqrt{6,25}\\x=-\sqrt{625}\end{cases}}< =>\orbr{\begin{cases}x=2,5\left(loai\right)\\x=-2,5\left(tm\right)\end{cases}}\)