का मान है

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DSSSB PGT Chemistry (Female) Official Paper (Held On: 06 Jul, 2018 Shift 1)
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  1. 10.101
  2. 0.00101
  3. 0.0101
  4. 1.01

Answer (Detailed Solution Below)

Option 1 : 10.101
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DSSSB PGT Hindi Full Test 1
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Detailed Solution

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दिया गया है:

a = 1.01, b = 0.01, x = 7.85, y = 2.15

प्रयुक्त सूत्र:

गणना:

प्रथम पद के लिए:

⇒ a + b = 1.01 + 0.01 = 1.02 

⇒ a − b = 1.01 − 0.01 = 1

⇒ a² = 1.0201, ab = 1.01 × 0.01 = 0.0101, b² = 0.0001

⇒ a² − ab + b² = 1.0201 − 0.0101 + 0.0001 = 1.0101

दूसरे पद के लिए:

⇒ x + y = 7.85 + 2.15 = 10

⇒ x − y = 5.7

⇒ परिणाम = 1.0101 × 10 = 10.101

∴ व्यंजक का मान 10.101 है।

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