


Ex 5.3
Ex 5.3, 1 (ii)
Ex 5.3, 1 (iii) Important
Ex 5.3, 1 (iv)
Ex 5.3, 2 (i)
Ex 5.3, 2 (ii) You are here
Ex 5.3, 2 (iii) Important
Ex 5.3, 3 (i)
Ex 5.3, 3 (ii)
Ex 5.3, 3 (iii)
Ex 5.3, 3 (iv) Important
Ex 5.3, 3 (v)
Ex 5.3, 3 (vi) Important
Ex 5.3, 3 (vii)
Ex 5.3, 3 (viii) Important
Ex 5.3, 3 (ix)
Ex 5.3, 3 (x)
Ex 5.3, 4
Ex 5.3, 5
Ex 5.3, 6 Important
Ex 5.3, 7
Ex 5.3, 8
Ex 5.3, 9
Ex 5.3, 10 (i)
Ex 5.3, 10 (ii) Important
Ex 5.3, 11 Important
Ex 5.3, 12
Ex 5.3, 13
Ex 5.3, 14 Important
Ex 5.3, 15 Deleted for CBSE Board 2022 Exams
Ex 5.3, 16 Important Deleted for CBSE Board 2022 Exams
Ex 5.3, 17 Deleted for CBSE Board 2022 Exams
Ex 5.3, 18 Important Deleted for CBSE Board 2022 Exams
Ex 5.3, 19 Important Deleted for CBSE Board 2022 Exams
Ex 5.3, 20 Important Deleted for CBSE Board 2022 Exams
Last updated at Aug. 3, 2021 by Teachoo
Ex 5.3, 2 Find the sums given below (ii) 34 + 32 + 30 + ……….. + 10 34 + 32 + 30 + ……….. + 10 Here, a = 34 d = 32 – 34 = –2 Also, Last term = 𝒍 = 10 To find sum, first we need to find n Using formula an = a + (n − 1)d Putting a = 34, d = −2, an = 10 in the formula 10 = 34 + (n − 1) × −2 10 − 34 = (n − 1) × −2 −24 = (n − 1) × −2 (−24)/(−2) = (n − 1) 12 = n − 1 n = 12 + 1 n = 13 For sum, we use the formula S = 𝒏/𝟐 (𝒂+𝒍) Putting a = 34, n = 13, l = 10 S13 = 13/2 (34+10) S13 = 13/2 (44) S13 = 286