Question

cum fac ?$( \frac{3}{5}) ^{4}$+20 supra8?

cum fac 3 pe 5 totul la a 3-a?

Answer 1

[3/5]⁴=3⁴/5⁴=81/625;
⇒81/625+20/8=0,1296+2,5=2,6296;
[3/5]³=3³/5³=9/125⇒gractie ireductibila;