railway RRB JE (CBT I + CBT II) Mock Test 2024 Quantitative Aptitude Algebra Identities

যদি একটি a + 1/a = 4 হয়, তবে (a - 1 / a) এর মানটি নির্ণয় করুন।

1
√3
2
2√3
3
3√3
4
4√3
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