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f(x) = e^x / x decreases & increases respectively in (-âˆž,0) U (0,1) & (1,âˆž) respectively

1 ) Then what r the no. of solutions of e^x = 2x ?

A) 0 B) 1 C) 2 D) >2

2 ) The no of solutions of e^x - 3x = 0 & e^x + 3x = 0 are respectively

A) 1, 0

B) 2,1

C) 1,2

D) 0,1
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2 Answers

1.b
2.a
Use graphs...

1357

Manish Shankar ·2009-10-25 00:06:44

Just draw the graph of f(x)

in first you have to find solution for f(x)=2

in second you have to find fo f(x)=3 and f(x)=-3

I m getting answers as

1. A
2. B

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