Question

In the symmetrical representation of three or more terms helps to solve sum or product of three terms so that in one of the equations ______

• A. a vanishes.
• B. The equation is no longer valid.
• C. a and d both vanish.
• D. d completely vanishes.

Answer 1

Answer: (D)

d completely vanishes.

In the symmetrical representation of three or more terms helps to solve sum or product of three terms so that in one of the equations the term d completely vanishes hence simplifying the equation. For example , while writing the sum of terms as $a-d+a+a+d=21$, we get $3a=7$ and hence with d now vanished, the value of a is explicit.

Hence the correct answer is $d$.