Question

. Write the right expression for Sum of predecessor and successor of 100 divided by 7.​

Answer 1

Answer:

(a-b)(a+b)=a^2-b^2

As we know that,

predecessor of 100=99

successor of 100=101

A/Q:

sum of predecessor & successor of 100 divided by 7

=99+101/7

=(100-1)(100+1)/7

=(100)^2-(1)^2/7 (using above identity)

=10000-1 /7

=9999 /7