If $n^{ ext {th }}$ term of an A.P. is $7 n-4$, then the common difference of the A.P. is\

Question

If $n^{	ext {th }}$ term of an A.P. is $7 n-4$, then the common difference of the A.P. is\

Professor PC Thomas Classes · Answer

(a):We have, $t_{1}=7(1)-4=3, t_{2}=7(2)-4=10$ and $t_{3}=7(3)-4=17$\ ∴ Common difference $=10-3=7$\