7 3 -10 - - (Given 1 = 5 and S = 75. Find a and a.

given d=5,S_(9)=75, find a and a_(9)

In an AP :- given d = 5, S_9 =75, find a and a_9 .

In an AP : given d = 5, S_(9) = 75 , find a and a_(9) .

In an AP : Given d = 5 , s_(9)=75 find a and a_9

In an AP: (i) given a=5, d=3, a_(n)=50 , find n and S_(n) . (ii) given a=7, a_(13)=35, find d and S_(13) (iii) given a_(12)=37, d=3 , find a and S_(12) (iv) given a_(3)=15, S_(10)=125 , find and a_(10) . (v) given d=5, S_(9)=75 and a and a_(9) . (vi) given a=2, d=8, S_(n)=90 , find n and a_(n) . (vii) given a=8, a_(n)=62, S_(n)=210 . find n and d. (viii) given a_(n)=4, d=2, S_(n) = -14, find n and a. (ix) given a_(n)=3, n=8, S_(n)=192, find d. (x) Given l=28, s=144 and there are total 9 terms find a.

If A = ([3,1],[7,5]) and A^2 = -xl+yA . Find x and y where I is a unit matric of order 2.

If A=[{:(3,1),(7,5):}] and A^2+xI=yA then find X and Y. Hence find A^(-1)

Find the LCM of 2.5, 1.2, 20 and 7.5.

Find x and y if (x+7,5) = (6,3x+y)