" 15."x^(2)+(1)/(x^(2))-7(x-(1)/(x))+8

" If (3x^(3)-8x^(2)+10)/((x-1)^(4))=(3)/(x-1)+(1)/((x-1)^(2))-(7)/((x-1)^(3))+(k)/((x-1)^(2)) then "k=

1<(3x^(2)-7x+8)/(x^(2)+1)<2

The expression (1)/(x-1)-(1)/(x+1)-(2)/(x^(2)+1)-(4)/(x^(4)+1) is equal to (8)/(x^(8)+1)( b) (8)/(x^(8)-1)( c) (8)/(x^(7)-1) (d) (8)/(x^(7)+1)

(17(2-x)-5(x+12))/(1-7x)=8

Evaluate : (2)x (1)/(4)-[(-18)/(7)x(-7)/(15)

1<(3x^(2)-7x+8)/(x^(2)+1)<=2

If x^(2)+(1)/(x^(2))=7 and x!=0: find the value of 7x^(3)+8x-(7)/(x^(3))-(8)/(x)

lim_(x rarr2)((x+2)^((1)/(2))-(15x+2)^((1)/(5)))/((7x+2)^((1)/(4))-x)