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If the function f(x)=(x^2)/2+lnx+a x is...

If the function `f(x)=(x^2)/2+lnx+a x` is always monotonically increasing in its domain then the least value of `a` is 2 (b) `-2` (c) `-1` (d) 1

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RESONANCE DPP ENGLISH-CONTINUITY AND DIFFERENTIABILITY-All Questions
  1. Let f(x) be a polynomial.Then, the second order derivative of f(e^x) i...

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  2. about to only mathematics

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  3. If the function f(x)=(x^2)/2+lnx+a x is always monotonically increasi...

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  4. fn(x)=e^(f(n-1)(x)) for all n in Na n df0(x)=x ,t h e n d/(dx){fn(x)}...

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  5. (d^2x)/(dy^2) equals: ((d^2y)/(dx^2))^(-1) (b) -((d^2y)/(dx^2))^(-1)(...

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  6. y=tan^(-1)""(4x)/(1+5x^(2))+tan^(-1)""(2+3x)/(3-2x)

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  7. If f (x) =lim (x to oo) x ((3)/(2) + [cos x)(sqrt(n^(2) +1)-sqrt(n ^(2...

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  8. If g(x)=(2h(x)+|h(x)|)/(2h(x)-|h(x)|) where h(x)=sinx-sin^n x ,n in R...

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  9. If f(x)=|"cos"(x+x^2)"sin"(x+x^2)-"cos"(x+x^2)"sin"(x-x^2)"cos"(x-x^2...

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  10. If If {:(" ""x"),(y=""),(" ""x"),(" ""a+")...

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  11. Find the sum of the series 1+2x+3x^2+(n-1)x^(n-2) using differentiatio...

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  12. If y=a^x^a^x^...^(((((oo))))) , then prove that (dy)/(dx)=(y^2(log)e ...

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  13. Let f(x)={s in2x ,0<xlt=pi//6a x+b ,pi//6<x<1 . If f(x)a n df^(prime)(...

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  14. If f is twice differentiable such that f''(x)=-f(x), f'(x)=g(x), h'(x...

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  15. Find (dy)/(dx) : x=a{cost+1/2logt a n^2t/2} and y=asint .

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  16. If x^m y^n=(x+y)^(m+n), prove that (dy)/(dx)=y/x .

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  17. If e^f(x)= log x and g(x) is the inverse function of f(x), then g'(x)...

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  18. "If "y=sec (tan^(-1)x)," then "(dy)/(dx)" at "x=1 is equal to

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  19. If 8f(x)+6f(1/x)=x+5 and y=x^2(f(x), then (dy)/(dx) at x=-1 is equal t...

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  20. If f(x)=2ln(x-2)-x^2+4x+1, then find the solution set of the inequalit...

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