Teaching DSSSB TGT Mock Test 2025 Mathematical Science Analysis Continuity & Differentiability

f(x) = \(\begin{cases}7 x^2+5 x+3 & ; x<0 \\ 7 x^2+5 x & ; x \geq 0\end{cases}\) पर विचार कीजिए, निम्नलिखित में से कौन-सा सत्य है?

1
f'''(0) = 0
2
f'''(x) = 0, ∀ x ∈ ℝ / {0}
3
f''(0) = 14
4
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