Which term of an AP 3,15,27,39,.....will be 132 more than its 54th term?
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Heya!!
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SOLUTION
We have,
First term a= 3
common difference= 12
Then as per given,
=) an= 132+ a54
=) a+(n-1)d = 132+(a+53d)
=)3+12(n-1)= 132+ (3+53×12)
=) 12n -9= 771
=) 12n= 771+9
=) 12n= 780
=) n= 780/12
=)n= 65
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