Calculus - theorem

1

NO SPECIAL THEOREM IS USED HERE

I THINK IS EXPANSIONIN NUMERATOR AND DEN SINCE IT IS IMPROPER FRACTION

JUST DO LONG DIVISION

1

how has this been divided?

1

expand ( 1- x )^4

= [( 1-x)^2]^2

[ 1+x^2-2x]^2

[(x^2+1)- (2x) ]^2

=[a-b]^2

where a = x^2+1

b= 2x

now u can proceed

1

ALL ABOUT IS CORRECT THEN CONTINUE EXPANDING. COLLECT TERMS FROM WHICH 1+X² CAN BE TAKEN COMMON AND PROCEED.........

theorem