The arithmetic sequence is the first one.
X^-1 = 1 / x ;
( x + 1 )^-1 = 1 / ( x + 1 ) ;
Then, x^-1 - ( x + 1 )^-1 = 1 / x - 1 / ( x + 1 ) = ( x + 1 ) / [x( x + 1 )] - x / [x( x + 1 )] = ( x + 1 - x ) /[x( x + 1 )] = 1 / [x( x + 1 )];
Finally, (1 / [x( x + 1 )])-2 =[x( x + 1 )]^2 = (x^2)[( x + 1 )^2] ;
Answer:
Step-by-step explanation:
Answer:
zero
Step-by-step explanation:
Here, we want to get the sign of the expression
since a is zero, it multiplies any value in the brackets to be zero too
zero is neither positive nor negative
What this mean is that we can only explicitly classify the sign as zero
Answer:
88
Step-by-step explanation:
9 pages
Each holds 9
He has 7 more
81+7=88
