Question

Plz help me with this ques!!​

Answer 1

Answer:

q = a + (p - 1)d

p = a + (q - 1)d

On substracting : q - p = (p - q)d

》d = -1

Putting d = -1 in equation 1 : q = a - p + 1

》a = q + p - 1

r term : a + (r - 1)d

》p + q - 1 - r + 1

》p + q - r