Teaching DSSSB TGT Mock Test 2025 Mathematics Differential Calculus Differentiability

माना f: [1, ∞ ]→ [2, ∞ ]एक अवकलनीय फलन इस प्रकार है कि f(1) = 2 है। यदि \( 6\displaystyle\int^x_1 f(t)dt=3x\ f(x)-x^3-5\), Ɐ x ≥ 1 है, तो f(2) का मान है :

1
6
2
4
3
\(\frac{1}{4}\)
4
\(\frac{1}{6}\)
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