Question

please solve it fast 66

Answer 1

if pth term is q
then
q = a + (p - 1)d
similarly
if qth term is p
p = a + (q - 1)d
now subtract them both
p - q = (q - p)d

so d = -1
if d = -1
a becomes p+q-1
so nth term becomes
a + (n - 1)d
filling values
p+q+1 + (n -1)(-1)
p+q-n

Answer 2

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