((0.9)3+(0.4)3)/(0.9+0.4) এর মান কত?
Solution
Correct Answer: Option D
{(0.9)³+(0.4)³ } / (0.9+0.4)
= (0.9+0.4){(0.9)²-(0.9 × 0.4)+(0.4)²} / (0.9+0.4)
= 0.81 - 0.36 + 0.16
= 0.61
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