the first term of A. P. is 1 and 12 th term is 45. Then its 18th term is
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Answer:
Answer is : 69
Step-by-step explanation:
a=1 n=18 d=4
an= a+(n-1)d
= 1+(18-1)4
= 1+17*4
= 1+68
= 69
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