Question

let Sn denotes the sum of first n terms of an ap if s4 is equal to 16 and S6 is equal to -48 then s 10 is equal to​

Answer 1

Answer:

Step-by-step explanation:

let a be the first term and d be the common difference

Given $S_{4}$ =16

$\frac{4}{2}$(2a+3d)=16

2a+3d=8-----  i

Given $S_{6}$=-48

2a+5d=16------ ii

solving i & ii

a=22 & d=-12

$S_{10}$=5((2*22)+(9*-12))=-320