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Find (dy)/(dx), when: y=2^(x).e^(3x)si...

Find `(dy)/(dx)`, when:
`y=2^(x).e^(3x)sin4x`

Text Solution

Verified by Experts

The correct Answer is:
`2^(x).e^(3x)sin4x.{(log2)+3+4cot4x}`
`logy=xlog2+3x+log sin 4x`
`rArr(1)/(y).(dy)/(dx)=(log2)+3+(4cos4x)/(sin4x).`
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RS AGGARWAL-DIFFERENTIATION-Exercise 10F
  1. Find (dy)/(dx), when: y=x^(xcosx)+((x^(2)+1)/(x^(2)-1))

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  2. Find (dy)/(dx), when: y=e^(x)sin^(3)xcos^(4)x

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  3. Find (dy)/(dx), when: y=2^(x).e^(3x)sin4x

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  4. Find (dy)/(dx), when: y=x^(x).e^((2x+5))

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  5. Find (dy)/(dx), when: y=(2x+3)^(5)(3x-5)^(7)(5x-1)^(3)

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  6. Find (dy)/(dx), when: (cosx)^(y)=(cosy)^(x)

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  7. Find (dy)/(dx), when: (tanx)^(y)=(tany)^(x)

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  8. If y=x^(logx)+(logx)^x then find (dy)/(dx)

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  9. if y=(sin^(- 1)x)/(sqrt(1-x^2)), prove that (1-x^2)(dy)/(dx)=x y+1

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  10. Ify=sqrt(x+y), prove that (dy)/(dx)=(1)/((2y-1)).

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  11. x^ay^b=(x+y)^(a+b) prove that dy/dx=y/x

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  12. If (x^(x)+y^(x))=1," show that "(dy)/(dx)=-{(x^(x)(1+logx)+y^(x)(logy)...

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  13. If y=e^(sinx)+(tanx)^(x)," prove that "(dy)/(dx)=e^(sinx)cosx+(tanx)^(...

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  14. If y=log[x+sqrt((1+x^2)]], prove that sqrt((1+x^2)) (dy)/(dx)=1.

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  15. "If "y=logsinsqrt(x^(2)+1)," prove that "(dy)/(dx)=(x cotsqrt(x^(2)+1)...

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  16. "If "y=logsqrt((1-cosx)/(1+cosx))", show that "(dy)/(dx)="cosec x".

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  17. If y=logtan(pi/4+x/2),\ show that (dy)/(dx)=secxdot Also find the ...

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  18. is y=sqrt((1-sin2x)/(1+sin2x)), show that (dy)/(dx)+sec^2(pi/4-x)=0

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  19. "If "y=logsqrt((1+cos^(2)x)/(1-e^(2x)))", show that "(dy)/(dx)=(e^(2x)...

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  20. "If "y=(x)^(cosx)+(sinx)^(tanx)", prove that "(dy)/(dx)=x^(cosx){(cosx...

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