1. Rozwiąż równania:
a)√x=7
b) ∛x=4
c) 2·√x=6
d)-3·∛x=9
e)2+√x=5
f)3·∛2x=-6
g)√x+1=4 ( √x+1--> 1 jest też w pierwiastku)
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a)√x=7
x = 7² = 49
b) ∛x=4
x = 4³ = 64
c) 2·√x=6 |:2
√x = 12
x = 12² = 144
d)-3·∛x=9 |:(-3)
∛x = -27
x = (-27)³ = -19683
e)2+√x=5
√x = 5-2
√x = 3
x = 3² = 9
f)3·∛2x=-6 |:3
∛2x = -2
2x = (-2)³ = -8
x = -4
g)√x+1=4
x+1 = 4²
x+1 = 16
x = 16-1 = 15