Teaching DSSSB TGT Mock Test 2025 Engineering Mathematics Calculus Vector Calculus

φ = 2xz - y2 का दिशात्मक अवकलज, बिंदु (1, 3, 2) पर किस की दिशा में अधिकतम हो जाता है?

1
4i + 2j – 3k
2
4i – 6j + 2k
3
2i – 6j + 2k
4
4i – 6j - 2k
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