Easy
1 point
ID: #28762
Question
a=√6+√5 হলে, (a⁶ -1)/a³ এর মান কত?
Options
1
43√5
Correct Answer
2
47√6
Correct Answer
3
46√5
Correct Answer
4
45√5
Correct Answer
Explanation
1/a = √6-√5। a - 1/a = 2√5। রাশিটি a³ - 1/a³। সূত্র: (a-1/a)³ + 3a(1/a)(a-1/a) = (2√5)³ + 3(2√5) = 40√5 + 6√5 = 46√5।
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