Advertisements
Advertisements
Question
If 11, a, b, 2, are in A.P., find the values of a and b.
Sum
Advertisements
Solution
a1 = 11
a2 = 2
an = a1 + (n − 1)d
2 = 11 + (4 − 1)d
2 = 11 + 3d
2 − 11 = 3d
− 9 = 3d
d = `(-9)/3`
d = −3
Calculate the values of a and b:
a = a1 + d
=11 + (−3)
= 8
b = a + d
= 8 + (−3)
= 5
shaalaa.com
Is there an error in this question or solution?
