An important question from ML Agarwal of Class10 for board examination We have been asked Justify whether it is true to say that the following are the nth term of an AP? (i) 2n-3
ML Agarwal (avichal publication) arithmetic progression chapter 9 question no 27(i)
Rajan@2021Guru
Justify whether it is true to say that the following are the nth term of an AP? (i) 2n-3
Share
an=2n−3
∴a1=2(1)−3=2−3=−1
a2=2(2)−3=4−3=1
a3=2(3)−3=6−3=3
a4=2(4)−3=8−3=5
So, d1=1−(−1)=2,d2=3−1=2,d3=5−3=2
As d1=d2=d3=2, hence an=2n−3 is the nth term of an A.P.