Q. ciang •-•

Jawaban:

f(x) = x! + x!!

f(7) = ….

penyelesaian :

f(7) = 7! + 7!!

f(7) = (7×6×5×4×3×2×1) + (7×(7-2)×(7-4)×(7-6))

f(7) = (42×20×6) + (7×5×3×1)

f(7) = (42×120) + (35×3)

f(7) = 5040 + 105

f(7) = 5.145

f(x) = x! + x!!

f(7) = ?

_______________

7! = 7 x 6 x 5 x 4 x 3 x 2 x 1

= 42 x 5 x 4 x 3 x 2 x 1

= 210 x 4 x 3 x 2 x 1

= 840 x 3 x 2 x 1

= 2.520 x 2 x 1

= 5.040

7!! = 7 x 5 x 3

= 35 x 3

= 105

_______________

f(x) = x! + x!!

f(7) = 7! + 7!!

f(7) = 5.040 + 105

f(7) = 5.155