Teaching DSSSB TGT Mock Test 2025 Mathematics Differential Calculus Applications of Derivatives

फलन f(x)=cot^-1x + x किस अंतराल में वर्धमान है?

1

(1, ∞)

2

(-1, ∞)

3

(-∞, ∞)

4

(0, ∞)

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