Sequences and Series
Two A.M.s A1 and A2; two G.M.s G1 and G2 and two numbers: then H1−1+H2−1 equals
Ramkali saved Rs 5 in the first week of a year and then increased her weekly savings by Rs 1.75. If in the nth week, her weekly savings become Rs 20.75, find n.
Choose the correct choice in the following and justify
(i) 30th term of the AP: 10,7,4,… is (A) 97 (B) 77 (C) −77 (D) 87
(ii) 11th term of the AP: –3,−21,2,… is (A) 28 (B) 22 (C) –38 (D) –4821
Sum of the first p, q and r terms of an A.P are a, b and c, respectively.Prove that pa(q−r)+qb(r−p)+rc(p−q)=0