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SEQUENCE AND SERIES Class -2 (Arithmetic Progression)

ARITHMETIC PROGRESSION nth term of an Arithmetic Progression d. = a commo n Sum of n term of an Arithmetic Progression 2. a f

If a, b, c be the pth, qth and rth terms respectively of an . ., then a (q-r) + b (r-p) + c (p-q) a. a b. 0 The middle term in the following arithmetic progression 20, 16, 12, ., 176 is a. 46,-80 C. 80, 46 b. 76, -80 d. none of these In the following two A.P.s, 2, 5, 8, 11, .. to 60 terms and 3, 5,7, 9, that are identical is to 50 terms, the number of terms b. 15 d. none of these C. 19 If alAp, ,G4, an, are in . ., where ai > 0 , for all 1, then Van-1 + Van n-1 n-3 7l d. none of these

The middle term in the following arithmetic progression 20, 16, 12, .., - 176 is a.-46, 80 c. 80, 46 b. 76, 80 d. none of these

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The middle term in the following arithmetic progression 20, 16, 12, .., - 176 is a.-46, 80 c. 80,-46 b. 76, 80 d. none of these el 2s, 26 m-l 49

If a, b, c be the pth, qth and rth terms respectively of an AP, then a (q-r)b (r - p) + c (p -q)- a. a b. 0 c. b

If a, b, c be the pth, qth and rth terms respectively of an AP, then a (q-r)b (r - p) + c (p -q)- a. a b. 0 c. b d. c

If a, b, c be the pth, qth and rth terms respectively of an AP, then a (q-r)b (r - p) + c (p -q)- a. a b. 0 c. b rahe

In the following two A.P.s, 2, 5, 8, 1 number of terms that are identical is to 60 terms and 3, 5, 7, 9, to 50 terms, the b. 15 c. 19 d. none of these

In the following two A.P.s, 2, 5, 8, 1 number of terms that are identical is to 60 terms and 3, 5, 7, 9, to 50 terms, the b. 15 c. 19 d. none of these lol 2.

If a1, a2, a3, a4..... an are in A.P., where ai > 0, for all i, then vai + vait vai + vait . + van-1 + d. none of these T n-3 a1tyan a n A Cn 2 I Nan-Jan- - Jai- Ja, dan - Ja, a3-