Jee Main
Limits Continuity And Differentiability
JEE Main 2025 (Online) 2nd April Evening Shift
MCQ+4 / -12025
\(If\,\mathop {\lim }\limits_{x \to 0} {{\cos (2x) + a\cos (4x) - b} \over {{x^4}}}is\,finite,\,then\,(a + b)\,is\,equal\,to:\)
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