Question

The first term a and common difference is given. Find first four term of AP.a = -1,d = -1/2

Answer 1

Answer:

If d=-1

(term=

n term+number of the term×common differences)

so,

1st term=-1+1×-1

=-1+(-1)

=-2

2nd term=-1+2×-1

=-1+-2

=-3

3rd term=-1+3×-1

=-1+-3

=-4

4th term=-1+4×-1

=-1+-4

=-5

Ap=-2 -3 -4 -5

if d=2

then,

1st term=-1+1×2

=-1+2

=1

2nd term=-1+2×2

=-1+4

=3

3rd term=-1+3×2

=-1+6

=5

4th term=-1+4×2

=-1+8

=7

Ap=1 3 5 7