2per5×2 negatif 3 tolong dijawab please

2/5 x 2^-3 gitu??
2/5 x 1/2³
2/5 x 1/8
2/40
1/20

Mapel : Matematika
Kelas : IX SMP
Bab : Eksponen

Pembahasan :
2/5 x 2¯³
= 2/5 x 1/2³
= 2/5 x 1/8
= (2 x 1)/(5 x 8)
= (1 x 1)/(5 x 4)
= 1/20