In and A.PA. (a) If a = 11, d = 2, n = 10 find T10 and S10(b) If a = 1

1.	In and A.PA. (a) If a = 11, d = 2, n = 10 find T10 and S10(b) If a = 12, d = 3, Tn = 84 find n(c) If d = 4 and T35 = 123 find a(d) If a = 3 and T20 = 60 find dB. (i) How many terms are there in A.P. 4, −1, −6, ………, (−106)(ii) Test whether 25 is a term of the A.P. 3, 6, 9, 12, 15, …….(iii) Test whether 36 is a term of the A.P. 4, 8, 12, 16, …….
Answer» In and A.P A. (a) If a = 11, d = 2, n = 10 find T₁₀ and S₁₀ (b) If a = 12, d = 3, T_n = 84 find n (c) If d = 4 and T₃₅ = 123 find a (d) If a = 3 and T₂₀ = 60 find d B. (i) How many terms are there in A.P. 4, −1, −6, ………, (−106) (ii) Test whether 25 is a term of the A.P. 3, 6, 9, 12, 15, ……. (iii) Test whether 36 is a term of the A.P. 4, 8, 12, 16, …….

In and A.PA. (a) If a = 11, d = 2, n = 10 find T10 and S10(b) If a = 12, d = 3, Tn = 84 find n(c) If d = 4 and T35 = 123 find a(d) If a = 3 and T20 = 60 find dB. (i) How many terms are there in A.P. 4, −1, −6, ………, (−106)(ii) Test whether 25 is a term of the A.P. 3, 6, 9, 12, 15, …….(iii) Test whether 36 is a term of the A.P. 4, 8, 12, 16, …….

Answer»

In and A.P

A. (a) If a = 11, d = 2, n = 10 find T₁₀ and S₁₀

(b) If a = 12, d = 3, T_n = 84 find n

(d) If a = 3 and T₂₀ = 60 find d

B. (i) How many terms are there in A.P. 4, −1, −6, ………, (−106)

(ii) Test whether 25 is a term of the A.P. 3, 6, 9, 12, 15, …….

(iii) Test whether 36 is a term of the A.P. 4, 8, 12, 16, …….

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