generalized Fibonacci & Lucas sequences | Desmos

Expression 3: "F" left parenthesis, "x" , right parenthesis equals StartFraction, left parenthesis, phi Superscript, 1 , Baseline "x" undefined minus left parenthesis, negative phi Subscript, 0 , Baseline , right parenthesis Superscript, "x" , Baseline , right parenthesis Over StartRoot, 5 , EndRoot , EndFraction

3

Expression 4: "f" left parenthesis, "x" , right parenthesis equals StartFraction, left parenthesis, phi Superscript, 1 , Baseline "x" undefined minus cos left parenthesis, pi "x" , right parenthesis phi Superscript, 0 , Baseline "x" undefined , right parenthesis Over StartRoot, 5 , EndRoot , EndFraction

4

Expression 5: "l" left parenthesis, "x" , right parenthesis equals left parenthesis, phi Superscript, 1 , Baseline "x" undefined plus cos left parenthesis, pi "x" , right parenthesis phi Superscript, 0 , Baseline "x" undefined , right parenthesis

5

6

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