Find the value of x, when in the A.P. given below2+6+10+ + x = 1800. – InterviewSolution

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1.	Find the value of x, when in the A.P. given below2+6+10+ + x = 1800.
Answer» Sn = n/2(2a+(n-1)d)1800=n/2(4+(n-1)(4))n^2 = 900n=30Tn = a +(n-1)dx = 2 + (29)(4) = 2 + 116 =118

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