Last seen: Jun 14, 2021
Common difference, d = 7 22nd term, a22 = 149 Sum of first 22 term, S22 = ? an = a+(n−1)d a22 = a+(22−1)d 149 = a+21×7 149 = a+147 a = 2...
Given that, First term, a = 17 Last term, l = 350 Common difference, d = 9 Let there be n terms in the A.P., thus the formula for last term ca...
Given that, first term, a = 5 last term, l = 45 Sum of the AP, Sn = 400 Sn = n/2 (a+l) 400 = n/2(5+45) 400 = n/2(50) Number of terms, n ...
Let there be n terms of the AP. 9, 17, 25 … For this A.P., First term, a = 9 Common difference, d = a2−a1 = 17−9 = 8 Sn = n/2 [2a+(n -1)d] ...
(i) Given that, first term, a = 3, Number of terms, n = 8 And sum of n terms, S = 192 As we know, Sn = n/2 [2a+(n -1)d] 192 = 8/2 [2×3+(8 -1...
(i) Given that, a = 2, d = 8, Sn = 90 Sn = n/2 [2a +(n -1)d] 90 = n/2 [2a +(n -1)d] ⇒ 180 = n(4+8n -8) = n(8n-4) = 8n2-4n ⇒ 8n2-4n –180 = 0...
(i) Given that, a12 = 37, d = 3 the nth term in an AP, an = a+(n −1)d, ⇒ a12 = a+(12−1)3 ⇒ 37 = a+33 ⇒ a = 4 Now, sum of nth term, Sn = ...
(i) Given that, a = 5, d = 3, an = 50 an = a +(n −1)d, ⇒ 50 = 5+(n -1)×3 ⇒ 3(n -1) = 45 ⇒ n -1 = 15 ⇒ n = 16 Now, sum of n terms, Sn = n...
(i) For this given A.P., 7 + + 14 + ...... + 84 First term, a = 7 nth term, an = 84 Common difference, d = a2 - a1 = = = Let 84 be the n...
(i) Given, 2, 7, 12 ,…, to 10 terms first term, a = 2 And common difference, d = a2 − a1 = 7−2 = 5 n = 10 sesum of nth term in AP series is...
Ramkali saved Rs.5 in first week and then started saving each week by Rs.1.75. and common difference, d = 1.75 Also given, an = 20.75 Find, n ...
The incomes of Subba Rao increases every year by Rs. 200 and hence, forms an AP. Therefore, after 1995, the salaries of each year are; 5000, 5200,...
We know that, the nth term of the AP is; an = a+(n-1)d a4 = a+(4-1)d a4 = a+3d In the same way, we can write, a8 = a+7d a6 = a+5d a10 = ...
The leaders of the Khilafat agitation were Mohammad Ali and Shaukat Ali.
Rabindranath Tagore renounced his knighthood to express the pain and anger of the country following the Jallianwala Bagh atrocities.
Champaran, Kheda and Ahmedabad.
He did so in order to fight against racial discrimination in South Africa.
Bepin Chandra Pal, Balgangadhar Tilak and Lala Lajpat Rai.
In deltaic Andhra the Swadeshi Movement was known as the Vandemataram Movement.
At that time Lord Curzon was the Viceroy of India.