703 + 20- 90-এর মান নির্ণয় করুন।

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SSC CGL 2021 Tier-I (Held On : 12 April 2022 Shift 1)
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  1. 0
  2. -300000
  3. 378000
  4. -378000

Answer (Detailed Solution Below)

Option 4 : -378000
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আমরা জানি, a3 + b3 + c3 = 3abc হয়, যদি a + b + c = 0 হয় 

703 + 203- 903

703 + 203 + (- 90)3

= 3 × 70 × 20 × (- 90)  [∵ 70 + 20 + (- 90) = 0]

= - 378000

∴ প্রদত্ত রাশিমালার মান হল - 378000

Alternate Method

প্রদত্ত:

প্রদত্ত রাশিমালাটি হল = 703 + 203- 903

গণনা:

703 + 203- 903

= 343000 + 8000 - 729000

= 351000 - 729000

= - 378000

∴ প্রদত্ত রাশিমালাটির মান হল - 378000

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