the fourth term of an ap is 14 and its 12th term 70 what is its form
Answers
Answered by
1
a4=15 a12=70
a+3d=15 (1) a+11d=70 (2)
Subtracting (1) and (2)
a+3d=15
a+11d=70
- - -
-8d=-55
d=55/8
put in(1)
a+3(55/8)=15
a+165/8=15
a=15-(165/8)
a= (120-165)/8
a=-45/8
a+3d=15 (1) a+11d=70 (2)
Subtracting (1) and (2)
a+3d=15
a+11d=70
- - -
-8d=-55
d=55/8
put in(1)
a+3(55/8)=15
a+165/8=15
a=15-(165/8)
a= (120-165)/8
a=-45/8
Similar questions