Question

Determine x sabendo,que n(A)=n(B)=3x-1 e n(AxB)=24?​

Answer 1

n(A)=3x-1

n(B)=3x-1

n(AxB)= n(A)x n(B)= (3x-1).(3x-1)=24

(3x-1)²=24

3x-1=√24

3x-1=2√6

x=±2√6+1/3

x¹=2√6+1/3

x²=-2√6+1/3

Espero ter ajudado!!