Question

2.Calculati
a)5²=.............
b)7²=.............
c)(-5)²=..........
d)(-7)²=..........
e)4³=..............
f)5³=...............
g)(-4)³=..........
h)(-5)³=...........
i)3⁴=..........
j)2⁵=..........
k)(-3)⁴=..........
l)(-2)⁵=...........
3.Calculati
a)(-2)³+3²
b)5²-(-2)⁴
c)2³+(-3)³
d)(-2)⁵+3²
e)(-3)²+
f)(-5)³+(-6)²
g)(-3)³-(-2)⁶
h)(-3)⁴-(-7)²
i)(-2)⁷-(-5)³


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Answer 1

Răspuns:

5²=5×5=2 7²=7×7=49 (-5)²=(-5)×(-5)=25 (-7)²=(-7)(-7)=49 4³=4×4×4=16×4=64 (-4)³=(-4)(-4)(-4)=16×(-4)=-64 (-3)⁴=(-3)(-3)(-3)(-3)=9×9=81

(-2)³+3²=-8+9=17

(-2)⁵+3²=-32+9=-23

(-5)³+(-6)2=-75+36=-39

(-3)³-(-2)⁶=-27-(+49)=-27-49=-76

(-2)⁷-(-5)³=(-128)-(-75)=-128+75=-53