2x-1
= 4 হলে, x2 + 1
42
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1
Answer:
2x−1x=4
⇒(2x−1x)2=42 [ উভয় পক্ষকে বর্গ করে পাই]
⇒4x2−2⋅2x⋅1x+1x2=16
⇒4x2−4+1x2=16
⇒4x2+1x2=16+4=20
⇒x2+14x2=204[ উভয় পক্ষকে 4 দ্বারা ভাগ করে পাই]
∴x2+14x2=5
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