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WB JEE 2017
MCQ (Single Correct Answer)
+1
-0.25
Let $$f(x) = {x^{13}} + {x^{11}} + {x^9} + {x^7} + {x^5} + {x^3} + x + 19$$. Then, f(x) = 0 has
A
13 real roots
B
only one positive and only two negative real roots
C
not more than one real root
D
has two positive nd one negative real rot
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