5x2 + (5p – 1)x – (2p + 5) या बहुपदीच्या शून्यांची बेरीज ही त्यांच्या गुणाकाराच्या एक चतुर्थांशाएवढी आहे. तर p ची किंमत शोधा.

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  1. \(-\frac{1}{2}\)
  2. 2
  3. – 2
  4. \(\frac{1}{2}\)

Answer (Detailed Solution Below)

Option 4 : \(\frac{1}{2}\)
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Detailed Solution

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दिलेले आहे:

5x2 + (5p – 1)x – (2p + 5) या बहुपदीच्या शून्यांची बेरीज = 1/4 × शून्यांचा गुणाकार

वापरलेले सूत्र:

बहुपदीचे मानक रूप, ax2 + bx + c = 0

शून्यांची बेरीज = - b/a 

शून्यांचा गुणाकार = c/a 

गणना:

शून्यांची बेरीज = - (5p - 1)/5  

शून्यांचा गुणाकार = - (2p + 5)/5 

प्रश्नानुसार;

⇒ - (5p - 1)/5 = 1/4 × [- (2p + 5)/5]

⇒ (5p - 1) = (2p + 5)/4 

⇒ 20p - 4 = 2p + 5 

⇒ 20p - 2p = 5 + 4 

⇒ 18p = 9 

⇒ p = 9/18 = 1/2 

∴ p ची किंमत = 1/2 

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