Question

1)If Sn denotes the sum of n terms of an AP whose common difference is d and 1st term is a. Find Sn – 2Sn – 1 + Sn – 2 .

2)A sector of circle of radius 12 cm has the angle 120⁰ . It is rolled up so that the two bounding radii are formed together to form a cone. Find the volume of the cone.​

Answer 1

Heyy mate here's your answer hope it helps❤️

1st and 2nd respectively