12.Calculați:
a) (-3)4- (-4)° + (-2)4 =-12-1-8=-21
b) (-3)³+(-1)⁰-(-2)²+(-5)²=-27+1-4+25=-5
c)4³:(-2)³+(-1)⁵=2⁶:(-2)³-1=-2³-1=-9
d(-5²)+(‐5)²+(-2⁴)=-25+25-16=-16
e)(-8²)+(-4)²-(-10)²=-64+16-10²=-48-100=-148
f)(-32)⁵⁴:(-16)⁵⁴×(-3)⁵⁴=(32/16)⁵⁴=2⁵⁴
13.Scrieți sub forma unei singure puteri cu exponent număr natural:
a)(+3)⁴×(+3)⁵=3⁹
b)(-6)²³×(-6)³⁶=(-6)²³×6³⁶=-6¹³
c)(+5)⁸⁰×(+5)¹⁴⁰=5²²⁰
d)[(-8)⁹]³=(-8)²⁷
e)[(-6)²⁴]⁴⁵=(6²⁴)⁴⁵=6¹⁰⁸⁰
f){[(-3)²]³}=(3)⁶=3⁶
