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

वह अंतराल जिसके लिए f(x) = x4 - 2x2 वर्धमान है:

1
(-∞, 1)
2
(-1, ∞)
3
(-∞, -1) ∪ (0, 1)
4
(-1, 0) ∪ (1, ∞)
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