Question

Maths
AP Arithmetic Progressions :
Five numbers are in ap the sum of the first
and last term is 16. Difference 3w them.
is 12 Find the no: in AP?
H
u m
firist
Jeni. Terims
is 18​

Answer 1

let no. be a, a+d, a+2d, a+3d, a+4d, a+5d.

a+a+5d=16

2a+5d=16 =1

a-(a+5d)=12

-5d=12

d=-12/5

in equation 1

2a+5(-12/5) =16

2a-12=16

2a=28

a=14