Question

The sum of first six terms of an AP is 42. The ratio of 10th term to its 30th term is 1:3.calculate the fist term and 13th term of A .

Answer 1

this is ur answer. hope u understood

Answer 2

Answer:

Step-by-step explanation

We will get 2a+5d =14---1

From a10by a30=1by3

We get 2a -2d=0----2

--eliminating 1 and 2

a=2=d

A1=2

A13=a+12d=26

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