[JEE Advanced 1982] the largest interval for which x 12 x 9 x 4 x 1 0
The largest interval for which $x^{12}-x^9+x^4-x+1>0$ is
(a) $-4<x\le0$
(b) $0<x<1$
(c) $-100<x<100$
(d) $-\infty<x<\infty$
1 Answer
VAVidaara Admin
✓ Vidaara Team
✓ Accepted
· 2d ago
▲ 0
Correct answer: (d) $-\infty<x<\infty$
Grouping shows the expression is positive for every real $x$, so the interval is all of $\mathbb R$.
JEE Advanced 1982 · Quadratic Equations and Inequations — verified solution by the Vidaara Team.
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