Question
Download Solution PDFयदि f(x) = \(\rm \displaystyle {1-x\over1+x}\) तो f-1(x) = ?
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Agniveer Navy SSR: 25th May 2025 Shift 2 Memory-Based Paper
- \(\rm\displaystyle{1-x\over1+x}\)
- \(\rm\displaystyle{1+x\over1-x}\)
- \(\rm\displaystyle{1\over1+x^2}\)
- x
Answer (Detailed Solution Below)
Option 1 : \(\rm\displaystyle{1-x\over1+x}\)
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Agniveer Navy SSR Full Test - 01
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Detailed Solution
Download Solution PDFअवधारणा:
फलन:
यदि y = f(x) तो हम कहते हैं कि x = f-1(y)
गणना:
माना कि y = f(x) = \(\rm\displaystyle{1-x\over1+x}\)
⇒ y(1 + x) = 1 - x
⇒ y + xy = 1 - x
⇒ xy + x = 1 - y
⇒ x(1 + y) = 1 - y
⇒ x = \(\rm\displaystyle{1-y\over1+y}\) = f-1(y)
y को x से प्रतिस्थापित करते हुए, हम कह सकते हैं कि:
f-1(x) = \(\rm\displaystyle{1-x\over1+x}\)
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