11 uždavinys
Sprendimas:
2^(x+3) =
16
16
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2^(x+3) = 16$$2^{(x+3)}$$ = $$16$$
2^(x+3) = 2* 2* 2* 2$$2^{(x+3)}$$ = $$2\cdot 2\cdot 2\cdot 2$$
2^(x+3) = 2^4$$2^{(x+3)}$$ = $$2^{4}$$
x + 3 = 4
x = 1
Sprendimas:
saknis(2-x) =
3
2-x) = 3
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saknis(2-x) = 3$$\sqrt {2-x}$$ = $$3$$
2-x) = 3$$\sqrt {2-x}$$ = $$3$$ saknis(2-x)^2 = 3^2$$\sqrt {2-x}^{2}$$ = $$3^{2}$$
2-x)^2 = 3^2$$\sqrt {2-x}^{2}$$ = $$3^{2}$$(2-x) = 3^2$$(2-x)$$ = $$3^{2}$$
(2-x) = 9$$(2-x)$$ = $$9$$
2-x = 9$$2-x$$ = $$9$$
2 = x+9$$2$$ = $$x+9$$
2-9 = x$$2-9$$ = $$x$$
-7 = x$$-7$$ = $$x$$
x = - 7