If 7.2 , a , b , 3 are in A.P , then find a , b ????
Answers
Answered by
45
given,it's an AP
so, 7.2+3d = 3
3d = -4.2
hence, d = -1.4
thus, a = 7.2 + (-1.4) = 5.8
b = 5.8 + (-1.4) = 4.4
.............................................hope this helps..........................................
so, 7.2+3d = 3
3d = -4.2
hence, d = -1.4
thus, a = 7.2 + (-1.4) = 5.8
b = 5.8 + (-1.4) = 4.4
.............................................hope this helps..........................................
Answered by
9
Answer:
given a=7.2 and 4th term is 3,then
4th, term =7.2+(4-1)d=3
7.2+3d=3
72÷10-3=3d
72-30÷10=3d
42÷10×3=d
d=14÷10=1.4
a=7.2-1.4=5.8
b=5.8-1.4=4.4
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