Question

The sum of first four terms of an ap is 56 the sum of last four terms is 112

Answer 1

Answer:

nd then wht we have to find in this...??plzz write the complete question dear...

Answer 2

Answer:

The sum of the first four terms of an A.P. is 56. The sum of the last four terms is 112. If its first term is 11, then find the number of terms. Let the A.P. be a, a + d, a + 2d, a + 3d, ... a + (n – 2) d, a + (n – 1)d.