Question

please answer ..................​

Answer 1

p + q - r is the answer

solution

if a +(p - 1) d = q

and a + (q - 1 ) d = p

by solving this equation we get

d = - 1

thus the nth term

= a +( n - 1) d

= (p + q - 1) + ( n - 1) × ( - 1)

= ( p + q - r)

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