Question
Download Solution PDF\(\frac{6.75~\times ~6.75~\times ~6.75-4.25~\times ~4.25~\times ~4.25}{67.5~\times ~67.5~+~42.5~\times ~42.5~+~67.5~\times ~42.5}=?\)
Answer (Detailed Solution Below)
Detailed Solution
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इस प्रकार के प्रश्न में, अंश में 6.75 और 4.25 है, जबकि हर में 67.5 और 42.5 गुणन में मौजूद हैं।
हर से, हम 67.5 × 67.5 को 6.75 × 10 × 6.75 × 10 = 100 × (6.75) के रूप में लिख सकते हैं, और इसी तरह अन्य पदों को भी लिख सकते हैं।
इसलिए हम हर से 100 को उभयनिष्ठ मानते हैं।
प्रयुक्त सर्वसमिका:
a3 - b3 = (a - b) (a2 + b2 + ab)
गणना:
\(\Rightarrow \text{ }\!\!~\!\!\text{ }\frac{6.75~\times ~6.75~\times ~6.75-4.25~\times ~4.25~\times ~4.25}{67.5~\times ~67.5~+~42.5~\times ~42.5~+~67.5~\times ~42.5}\)
\( \Rightarrow {\rm{}}\frac{{\left[ {\left( {6.75{\rm{\;}}-{\rm{\;}}4.25} \right)\left( {6.75{\rm{\;}} \times {\rm{\;}}6.75{\rm{\;}} + {\rm{\;}}4.25{\rm{\;}} \times {\rm{\;}}4.25{\rm{\;}} + {\rm{\;}}6.75{\rm{\;}} \times {\rm{\;}}4.25} \right)} \right]}}{{[100{\rm{\;}} \times {\rm{\;}}\left( {6.75{\rm{\;}} \times {\rm{\;}}6.75{\rm{\;}} + {\rm{\;}}4.25{\rm{\;}} \times {\rm{\;}}4.25{\rm{\;}} + {\rm{\;}}6.75{\rm{\;}} \times {\rm{\;}}4.25} \right)}}\)
⇒ ? = 2.5/100
⇒ ? = 0.025
∴ ? = 0.025
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