.Q.
7!! - 5! × 6! =
• Dahulukan perkalian.
Note : Thanks
7!! - 5! × 6! =
• Dahulukan perkalian.
Note : Thanks
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= ( 7 × 5 × 3 × 1 ) - 5! × 6!
= ( 35 × 3 × 1 ) - 5! × 6!
= ( 105 × 1 ) - 5! × 6!
= 105 - 5! × 6!
= 105 - ( 5 × 4 × 3 × 2 × 1 ) × 6!
= 105 - ( 20 × 3 × 2 × 1 ) × 6!
= 105 - ( 60 × 2 × 1 ) × 6!
= 105 - ( 120 × 1 ) × 6!
= 105 - 120 × 6!
= 105 - 120 × ( 6 × 5 × 4 × 3 × 2 × 1 )
= 105 - 120 × ( 30 × 4 × 3 × 2 × 1 )
= 105 - 120 × ( 120 × 3 × 2 × 1 )
= 105 - 120 × ( 360 × 2 × 1 )
= 105 - 120 × ( 720 × 1 )
= 105 - 120 × 720
= 105 - ( 120 × 720 )
= 105 - 86.400
= -86.295
−86295
Penjelasan dengan langkah-langkah:
7!! - 5! × 6! =
7!! = 7×5×3×1
= 35×3×1
= 105×1
= 105
5! = 5×4×3×2×1
= 20×3×2×1
= 60×2×1
= 120×1
= 120
6! = 6×5×4×3×2×1
= 30×4×3×2×1
= 120×3×2×1
= 260×2×1
= 720×1
= 720