Jika a=1/2, b=2/3 dan c = 7/4 maka nilai ab+ac+bc adalah... A. 49/24 B. 15/17 C. 20/18 D. 57/24 Tolong caranya ya

a = 1/2, b =2/3, c = 7/4
ab + ac + bc
= (1/2 × 2/3) + (1/2 × 7/4) + (2/3 × 7/4)
= 2/6 + 7/8 + 14/12
= 8/24 + 21/24 + 28/24
= 57/24 (D)

Ab = 1/2 x 2/3 = 1/3
Ac = 1/2 x 7/4 = 7/8
Bc = 2/3 x 7/4 = 7/6
1/3 + 7/8 + 7/6 = 8 + 21 + 28 / 24
= 57/24 (D)

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