निम्नलखित `A.P.` के योग ज्ञात कीजिए:
` 3,8,13,......20` पदों तक
(ii)` 1,4,7,....50` पदों तक
(iii)` 8,5,2,..........25` पदों तक
(iv)` (a+b),(2a+3b),(3a+5b),.........n` पदों तक

Find the sum of the following A.P.'s : (i) 3,8,13, .... to 20 terms. (ii) 1,4,7,......... to 50 terms. (iii) 8,5,2, .... to 25 terms. (iv) (a+b), (2a+3b), (3b+5b), ........ to n terms.

Find the sum of the following A.P.'s : (i) 3,8,13, .... to 20 terms. (ii) 1,4,7,......... to 50 terms. (iii) 8,5,2, .... to 25 terms. (iv) (a+b), (2a+3b), (3b+5b), ........ to n terms.

For the following A.P.'s , write the first term and common difference : (i) 2, 5, 8, 11, .... (ii) -5, -1, 3, 7, ..... (iii) 0.6, 1.7, 2.8, 3.9, ...... (iv) 5, 2, -1, -4, .....

For the following A.P.'s , write the first term and common difference : (i) 2, 5, 8, 11, .... (ii) -5, -1, 3, 7, ..... (iii) 0.6, 1.7, 2.8, 3.9, ...... (iv) 5, 2, -1, -4, .....

Which of the following are A.P. (i) 1,3,5,7,… (ii) pi,pi+e^(pi),pi+2e^(pi),"...." (iii) a, a-b, a-2b,a-3b,"…."

Which of the following are A.P. (i) 1,3,5,7,… (ii) pi,pi+e^(pi),pi+2e^(pi),"...." (iii) a, a-b, a-2b,a-3b,"…."

Which of the following are A.P. (i) 1,3,5,7,… (ii) pi,pi+e^(pi),pi+2e^(pi),"...." (iii) a, a-b, a-2b,a-3b,"…."

Factorize (i) 5a^2-20ab (ii) 36a^3b-60a^2bc (iii) 5a(b+c)-7b(b+c) (iv) 6(2a+3b)^2-8(2a+3b)

Which of the following sequences are in A.P.? (i)1,3,6,10,... " "(ii)3,8,13,18,... (iii)7,4, 1,-1,... " "(iv)-10,13,-16,19,...