if 18, a,b,-3 are in ap then a+b is equal to
Answers
Answered by
7
a-18=b-a=-3-b=common difference
Now 2a=18+b or a=(18+b)/2
And 2b=-3+a
2b= -3+18/2+b/2
2b-b/2= 12/2
3b/2=6
b=4
And a=11
So a+b=11+4=15
Now 2a=18+b or a=(18+b)/2
And 2b=-3+a
2b= -3+18/2+b/2
2b-b/2= 12/2
3b/2=6
b=4
And a=11
So a+b=11+4=15
Similar questions