Question

find the 4th term from the end in an A.P. -11, -8, -5, . . . . . , 49.

Answer 1

Hii friend,

AP = -11 , -8 , -5 ,......,49

Last term= 49

common difference (D) = -8-(-11) = -8+11 = 3

First term (A) = -11

Therefore,

4th term of an AP = (L -3D) = 49 - 3 × 3 = 49-9 = 40.

Hence,

The 4th term of an AP from the last is 40.


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