4 term of an ap is zero prove that the 25th term of the AP 3 times its

1.	4 term of an ap is zero prove that the 25th term of the AP 3 times its 11 term
Answer» 4th term of AP is 0 This implies that 4th term = a+ (4-1)d. 0=a+3d. a=-3d11th term = a+(11-1)d. 11th =-3d+10d. 11th=7d. equation-----(1). 25th term=a+(25-1)d. 25th= -3d+24d25th =21d. equation--------(2)On comparing equation--(1) & equation--(2) ,we get3 times of 11th term =25th term

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