Question

determinati A=(2x-1)|121, B=(3x+1)|125,C=(x+1)|(x+50)

Answer 1

avand in vedere ca nu ai precizat, voi rezolva pentru x apartine numerelor naturale
2x-1 ∈ {1,11,121} ⇒ 2x ∈{ 2,12,122} ⇒ x∈{1,6,61}

3x+1 ∈ {1,5,25,125} ⇒ 3x∈{0,4,24,124} ⇒ x∈{0,8}

x+1/x+50
x+1/x+1
prin scadere se obtine x+1/49 ⇒ x+1∈{1,7,49} ⇒ x∈{0,6,48}