Which term of A.P. 72, 70, 68, 66, ... is 40?(A) 16(B) 17(C) 18(D) 20� – InterviewSolution

1.	Which term of A.P. 72, 70, 68, 66, ... is 40?(A) 16(B) 17(C) 18(D) 20
Answer» 17thStep-by-step EXPLANATION:a=72,d=70−72=68−70=66−68=−2a N =40General TERM : a n =a+(n−1)DA+(n−1)d=4072+(n−1)(−2)=4072−2n+2=402n=34n=17

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