f(x) = x! ÷ x + x!!
f(6) = 6! ÷ 6 + 6!!
f(6) = (6 × 5 × 4 × 3 × 2 × 1) ÷ 6 + (6 × 4 × 2)
f(6) = (30 × 4 × 3 × 2 × 1) ÷ 6 + (24 × 2 )
f(6) = (120 × 3 × 2 × 1) ÷ 6 + 48
f(6) = (360 × 2 × 1 ) ÷ 6 + 48
f(6) = (720 × 1) ÷ 6 + 48
f(6) = 720 ÷ 6 + 48
f(6) =120 + 48
f(6) = 168
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f(x) = x! ÷ x + x!!
f(6) = 6! ÷ 6 + 6!!
f(6) = (6 × 5 × 4 × 3 × 2 × 1) ÷ 6 + (6 × 4 × 2)
f(6) = (30 × 4 × 3 × 2 × 1) ÷ 6 + (24 × 2 )
f(6) = (120 × 3 × 2 × 1) ÷ 6 + 48
f(6) = (360 × 2 × 1 ) ÷ 6 + 48
f(6) = (720 × 1) ÷ 6 + 48
f(6) = 720 ÷ 6 + 48
f(6) =120 + 48
f(6) = 168
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