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x+y-ln(x+y)=2x+5 has a vertical tangent ...

`x+y-ln(x+y)=2x+5` has a vertical tangent at the point `(alpha,beta)` then `alpha+beta` is equal to

A

`-1`

B

1

C

2

D

`-2`

Text Solution

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The correct Answer is:
B
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CENGAGE-APPLICATION OF DERIVATIVES-Exercise (Single)
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  10. The equation of the line tangent to the curve x isn y + x = pi at the ...

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  11. The x-intercept of the tangent at any arbitrary point of the curve a/(...

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  12. At any point on the curve 2x^2y^2-x^4=c , the mean proportional betwee...

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  13. Given g(x) (x+2)/(x-1) and the line 3x+y-10=0. Then the line is

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  14. If the length of sub-normal is equal to the length of sub-tangent at ...

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  16. Tangent of acute angle between the curves y=|x^2-1| and y=sqrt(7-x^2) ...

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  17. The line tangent to the curves y^3-x^2y+5y-2x=0 and x^2-x^3y^2+5x+2y=0...

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  18. The two curves x=y^2,x y=a^3 cut orthogonally at a point. Then a^2 is ...

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  19. The tangent to the curve y=e^(k x) at a point (0,1) meets the x-axis a...

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