Whats 1/99.100 - 1/99.98 - 1/98.97 - ... - 1/2.1

-9799/9900

Step-by-step explanation:

1/(99×100) - [1/2.1 + 1/3.2+ ... 1/99.98]

1/2.1 + 1/3.2+ ... 1/99.98

1((n+1)(n) = 1/n - 1/(n+1)

Sum from n=1 till n=98

1/(99×100) - [1 - 1/99]

1/(99×100) - 98/99

(1 - 9800)/9900

-9799/9900

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.