Question

Find n if the given value of x is the nth term of the given A.P.
(i) 25,50,75,100,...,x=1000
(ii)-1,-3,-5,-7,...,x=-151
(iii)$5\frac{1}{2},11,16\frac{1}{2},22,...,x=550$
(iv)$1,\frac{21}{11},\frac{31}{11},\frac{41}{11},...,x=\frac{171}{11}$

Answer 1

(i) 40 (ii) 76 (iii) 100 (iv) 17