`lim_(xrarr-1)((x^4+x^2+x+1)/(x^2-x+1))^((1-cos(x+1))/((x+1)^2))` is equal toA. 1B. `sqrt(2//3)`C. `sqrt(3//2)`D. `e^(1//2)`

`lim_(xrarr-1)((x^4+x^2+x+1)/(x^2-x+1))^((1-cos(x+1))/((x+1)^2))` is e

1.	`lim_(xrarr-1)((x^4+x^2+x+1)/(x^2-x+1))^((1-cos(x+1))/((x+1)^2))` is equal toA. 1B. `sqrt(2//3)`C. `sqrt(3//2)`D. `e^(1//2)`
Answer» Correct Answer - B We observe that `(x^4+x^2+x+1)/(x^2-x+1)to(2)/(3)as xto-1` But, ` (1-cos(x+1))/(x+1)^2to (0)/(0) as xto -1`. ` therefore lim_(xto-1)((x^4+x^2+x+1)/(x^2-x+1))^((1-cos(x+1))/((x+1)^2))` ` =((2)/(3))^(lim_(xto-1)((1-cos(x+1))/(x+1)^2))=((2)/(3))^(lim_(xto-1))(2sin^(2).(x+1)/(2))/(4((x+1)/2)^(2))=((2)/(3))^(1//2)`

`lim_(xto oo) (1)/(n) {1+e^(1//n)+e^(2//n)+e^(3//n)+.....+e^((n-1)/(n))}` is equal toA. eB. `-e`C. `e-1`D. `1-e`
`lim_(xto oo) ((nsqrt(a)+nsqrt(b))/(2))^n,a,b,gt 0` equalsA. 1B. `sqrt(pq)`C. `pq`D. `(pq)/(2)`
If `lim_(xto oo){(x^2+1)/(x+1)-(ax+b)}to oo`, thenA. `a in (1,oo)`B. `a ne 1 , b in R`C. `a in (-oo,1)`D. none of these
Evaluate:\(\lim\limits_{x \to 1}\frac{\sqrt {1+x}-\sqrt {1-x}}{1+x}\)
\(f\left(x\right)=\left[\left(\frac{min\left(t^2+4t+6\right)\sin \left(x\right)}{x}\right)\right]\)where [.] represents greatest integer function, then find \(\lim _{x\to 0}\left(f\left(x\right)\right)\)
`lim_(xrarr0) ((1-cos2x)^2)/(2xtanx-xtan2x)` , isA. 2B. `-(1)/(2)`C. `(1)/(2)`D. `-2`
The value of `lim_(xrarroo) ((x+3)/(x-1))^(x+1)` isA. eB. `e^2`C. `e^4`D. `1//e`
`lim_(xrarroo) ((x+2)/(x+1))^(x+3)` is equal toA. 1B. eC. `e^2`D. `e^3`
`lim_(x->0)((1-cos2x)sin5x)/(x^2sin3x)`A. `(10)/(3)`B. `(3)/(10)`C. `(6)/(5)`D. `(5)/(6)`
`lim_(x->0)((1-cos2x)sin5x)/(x^2sin3x)`A. `10//3`B. `3//10`C. `6//5`D. `5//6`