The arrangement of the following curves in the ascending order of slopes of their tangents at the given points. A)y=11+x2 at x=0 B)y=2e−x4, where it cuts the y-axis C)y=cos(x) at x=−π4 D)y=4x2 at x=−1
A
DCBA
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B
ACBD
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C
ABCD
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D
DBAC
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Solution
The correct option is D DBAC (A) y1=−2x(1+x2) y1|x=0=0 (B) y1=−2x(4 y1|x=0=−12 (C) y1=−sinx y1|x=−pi/4=1√2 (D) y1=8x y1|x=−1=−8 (C)>(A)>(B)>(D)