19)
a) Df = x∈(-∞,4>
b) Zw = y∈(-∞,-2) u <0,2>
c) f(-3) = -3
d) 4
20)
a) Df = x∈R
b) Zw = y∈R
c) f(-5)*f(-3)+f(1)=2*2+4=8
d) x∈{-4,-1}
21)
a) Df = x∈ {-5} u <-4,2>
b) Wf = y∈(-2,4>
c) f(-4) = 1, f(1)=3
d) -5, 0
22)
a) Df = x∈(-5,6)
b) Wf = y∈(-2,0) u <1,4>
c) f(2) * [f(6)-f(-3)] =2 * (4-1) = 6
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19)
a) Df = x∈(-∞,4>
b) Zw = y∈(-∞,-2) u <0,2>
c) f(-3) = -3
d) 4
20)
a) Df = x∈R
b) Zw = y∈R
c) f(-5)*f(-3)+f(1)=2*2+4=8
d) x∈{-4,-1}
21)
a) Df = x∈ {-5} u <-4,2>
b) Wf = y∈(-2,4>
c) f(-4) = 1, f(1)=3
d) -5, 0
22)
a) Df = x∈(-5,6)
b) Wf = y∈(-2,0) u <1,4>
c) f(2) * [f(6)-f(-3)] =2 * (4-1) = 6
d) 4