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If the sum of n terms of an AP is given by S_n=a+bn+cn^2,where a,b and c are independent of n, then a. a≠0 b. d≠3b c.d=2c d. first term of an AP is b- |
Answer» If the sum of n terms of an AP is given by S_n=a+bn+cn^2,where a,b and c are independent of n, then a. a≠0 b. d≠3b c.d=2c d. first term of an AP is b- | |