Range from an Arrow Diagram

Difficulty: Easy · Topics: Algebra, Functions, Function Values

Strelkali diagrammadan qiymatlar sohasi

The arrow diagram shows a function f:X→ Y.

graph "x":[-4,4],"y":[-3.2,3.8],"axes":false,"label":"Arrow diagram of f from X to Y","items":["type":"ellipse","at":[-2.3,0],"rx":1.05,"ry":2.9,"ink":true,"width":1.4,"type":"ellipse","at":[2.3,0],"rx":1.05,"ry":2.9,"ink":true,"width":1.4,"type":"label","at":[-2.3,3.35],"text":"X","size":17,"type":"label","at":[2.3,3.35],"text":"Y","size":17,"type":"label","at":[0,3.15],"text":"f","size":17,"type":"point","at":[-2.05,2.1],"ink":true,"type":"label","at":[-2.35,1.97],"text":"1","anchor":"w","italic":false,"type":"point","at":[-2.05,0.7],"ink":true,"type":"label","at":[-2.35,0.57],"text":"2","anchor":"w","italic":false,"type":"point","at":[-2.05,-0.7],"ink":true,"type":"label","at":[-2.35,-0.83],"text":"3","anchor":"w","italic":false,"type":"point","at":[-2.05,-2.1],"ink":true,"type":"label","at":[-2.35,-2.23],"text":"4","anchor":"w","italic":false,"type":"point","at":[2.05,2.1],"ink":true,"type":"label","at":[2.35,1.97],"text":"5","anchor":"e","italic":false,"type":"point","at":[2.05,1.05],"ink":true,"type":"label","at":[2.35,0.92],"text":"6","anchor":"e","italic":false,"type":"point","at":[2.05,0],"ink":true,"type":"label","at":[2.35,-0.13],"text":"7","anchor":"e","italic":false,"type":"point","at":[2.05,-1.05],"ink":true,"type":"label","at":[2.35,-1.18],"text":"8","anchor":"e","italic":false,"type":"point","at":[2.05,-2.1],"ink":true,"type":"label","at":[2.35,-2.23],"text":"9","anchor":"e","italic":false,"type":"vector","from":[-1.9,2.1],"to":[1.88,2.1],"ink":false,"width":1.7,"type":"vector","from":[-1.9,0.7],"to":[1.88,0],"ink":false,"width":1.7,"type":"vector","from":[-1.9,-0.7],"to":[1.88,2.1],"ink":false,"width":1.7,"type":"vector","from":[-1.9,-2.1],"to":[1.88,-2.1],"ink":false,"width":1.7]

Find the sum of all elements of the range of f.