The sum of the first n terms of the arithmetic progression 4,10, equals the 64th term of the arithmetic progression 21,42, find

Question

Алгебра: The sum of the first n terms of the arithmetic progression 4,10, equals the 64th term of the arithmetic progression 21,42, find n? ​

777stepan777 · Answer

Answer 21The solotion to this task...

The sum of the first n terms of the arithmetic progression 4,10, equals the 64th term of the arithmetic progression 21,42, find n? ​