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טלמון שתראה שלמדתי,
(1,4) (2,8) (3,15) (4,16) (5,-37.5) X=מספר האיבר y= 4(x - 2)(x - 3)(x - 4)(x - 5)/[(1 - 5)(1 - 2)(1 - 3)(1 - 4)] + + 8(x - 1)(x - 3)(x - 4)(x - 5)/[(2 - 5)(2 - 1)(2 - 3)(2 - 4)] + + 15(x - 1)(x - 2)(x - 4)(x - 5)/[(3 - 5)(3 - 1)(3 - 2)(3 - 4)] + + 16(x - 1)(x - 2)(x - 3)(x - 5)/[(4 - 5)(4 - 1)(4 - 2)(4 - 3)] + + -37.5(x - 1)(x - 2)(x - 3)(x - 4)/[(5 - 1)(5 - 2)(5 - 3)(5 - 4)]