The value of `(a+1)(a-1)(a^2+1)` is `(a^4-1)`

1.The value of ( 1/2 + 1/4 ) is equal to

The value of [{(81)^(-1/2)}^(-1/4)]^2

Determine the value of '?' in: ( 1- (1)/(2) ) ( 1- (1)/(3) ) ( 1- (1)/(4) ) ......... (1- ( 1)/( n) ) = ?

The value of (1 - 1/2) (1 - 1/3) (1 - 1/4)(1 - 1/5) ………(1 - 1/n) is :

The value of (1-1/2)(1-1/3)(1-1/4)(1-1/5)…(1-1/n) is :

The value of tan^(-1)((1)/(3))+tan^(-1)((2)/(9))+tan^(-1)((4)/(33))+tan^(-1)((8)/(129))+...n terms is:

Find the value of ( -1/2 )^5 / ( -1/2 )^4 ÷ ( ( -1/8 ) )/( (-1/4 ) ) is ( A ) 2 ( B ) 0 ( C ) 1 ( D ) -1

The value of ((1)/(2)" of "1(1)/(2))-:(3(1)/(2)-1(1)/(4))" of "1(1)/(2)-1(1)/(2)-:2(1)/(4)+1(1)/(3) is: