2
[ .6 x .6 x .6 x .4 x .4 x .4 + 3 x .6 x .4 x (.6 + .4 )] = ?
- A2
- B4
- C1
- D3
Correct answer: C
Discussion 1
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0
CCommunity
1
Given expression =(.6)³ + (.4) ³ + 3 x .6 x .4 x (.6 + .4)
= a³ + b³ + 3ab (a+b)
= (a+b)³
= (.6 + .4)³
= 1³
= 1
Given expression =(.6)³ + (.4) ³ + 3 x .6 x .4 x (.6 + .4)
= a³ + b³ + 3ab (a+b)
= (a+b)³
= (.6 + .4)³
= 1³
= 1