engineering recuitment AAI Junior Executive (Common Cadre) Mock Test 2023 Quantitative Aptitude Algebra Identities

If 49a2 + 25b2 = 30 and ab = 1, a, b > 0, then the value of (7a + 5b) is:

1
10
2
12
3
14
4
8
5
None of these
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