a=3 d=15-3=12 Let the term of the ap be añ añ=a54+132 a+(n-1)d=a+53d+132 Putting the values 3+(n-1)12=3+53*12+132 3+12n-12=3+636+132 12n-9=3+768 12n-9=771 12n=771+9 12n=780 n=780/12 n=65

3Thank You

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