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lim(x to 0) (sin(x^(2)))/("ln"(cos(2x^(2...

`lim_(x to 0) (sin(x^(2)))/("ln"(cos(2x^(2)-x)))` is equal to

A

`e^(a)`

B

`-a`

C

`e^(1-a)`

D

`e^(1+a)`

Text Solution

Verified by Experts

The correct Answer is:
B
`underset(xto0)lim(sin(x^(2)))/("ln"(cos(2x^(2)-x)))`
`=underset(xto0)lim(sin(x^(2)))/(log(1-2sin^(2)((2x^(2)-x)/(2))))`
`=underset(xto0)lim(sin(x^(2))x^(2))/((x^(2)log(1-2sin^(2)((2x^(2)-x)/(2))))/(-2sin^(2)((2x^(2)-x)/(2)))[-2sin^(2)((2x^(2)-x)/(2))])`
`=underset(xto0)lim-(x^(2))/((2sin^(2)((2x^(2)-x)/(2)))/(((2x^(2)-x)/(2))^(2))((2x^(2)-x)/(2))^(2))`
`=underset(xto0)lim-(2x^(2))/((2x^(2)-x)^(2))=underset(xto0)lim-(2)/((2x-1)^(2))=-2`
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CENGAGE-LIMITS-Exercise (Single)
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  2. The value of lim(xtooo) ((2^(x^(n)))e^((1)/(x))-(3^(x^(n)))e^((1)/(x))...

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  3. lim(x to 0) (sin(x^(2)))/("ln"(cos(2x^(2)-x))) is equal to

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  4. lim(xtooo) (e^(1//x^(2))-1)/(2tan^(-1)(x^(2))-pi) is equal to

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  5. lim(xto0) ((2^(m)+x)^(1//m)-(2^(n)+x)^(1//n))/(x) is equal to

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  6. The value of lim(ntooo) [(1)/(n)+(e^(1//n))/(n)+(e^(2//n))/(n)+...+(e^...

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  7. lim(xto1) (nx^(n-1)-(n+1)x^(n)+1)/((e^(x)-e)sinpix), where n=100,is eq...

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  8. lim(xto0) (log(1+x+x^(2))+log(1-x+x^(2)))/(secx-cosx)=

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  9. The value of lim(xto0) (root(3)(x^(3)+2x^(2))-sqrt(x^(2)+x)) is

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  10. The value of lim(xto0) (1+sinx-cosx+log(1-x))/(x^(3)) is

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  11. lim(xto0) (cos(tanx)-cosx)/(x^(4)) is equal to

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  12. If lim(xto0) (x^(-3)sin3x+ax^(-2)+b) exists and is equal to 0, then

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  13. If lim(xto0) (x^(n)sin^(n)x)/(x^(n)-sin^(n)x) is non-zero finite, then...

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  14. lim(xto0) ((1+tanx)/(1+sinx))^(cosecx) is equal to

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  15. The value of lim(xto1) (2-x)^(tan((pix)/(2))) is

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  16. The value of lim(mtooo) ("cos"(x)/(m))^(m) is

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  17. lim(ntooo) ((n^(2)-n+1)/(n^(2)-n-1))^(n(n-1)) is equal to

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  18. lim(ntooo) {((n)/(n+1))^(a)+"sin"(1)/(n)}^(n) (where alphainQ) is equa...

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  19. lim(xtooo) [((e)/(1-e))((1)/(e)-(x)/(1+x))]^(x) is

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  20. lim(x->0)((1^x+2^x+3^x+....+n^x)/n)^(1/x)

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