If 2, a-5, 7 and b-2 are in A.P. , find the value of b.
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Given A.P = 2, a-5, 7, b-2
Here a(first term)=2
3rd term = 7
a+2d=7
2+2d=7
2d = 5
⇒ d = 5/2 = 2.5 (common difference)
Here b-2 is 4th term
⇒ a + 3d = b-2
2+3*2.5+2 = b
b = 11.5
Here a(first term)=2
3rd term = 7
a+2d=7
2+2d=7
2d = 5
⇒ d = 5/2 = 2.5 (common difference)
Here b-2 is 4th term
⇒ a + 3d = b-2
2+3*2.5+2 = b
b = 11.5
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