Question

which term of the ap 15,27,39....will be 144 more than 54th term

Answer 1

Hey, sup!

As per the question,

a=15.
d=27-15=12.

144 = 144/12 = 12 terms

54term+12terms= 66th term.

So 66th term will be 144 more than 54th term.
Hope it helps.

Answer 2

a = 15
d = 12
                                           an = a54 + 144
                           a + (n - 1) d  = a + 53d + 144
                         15 + 12n - 12 = 15 + 53*12+ 144
                                        12n = 792
                                            n = 66