Question

if an ap have 8 as first term and -5 as common difference and its first 3 terms are 8,A,B then A+B =​

Answer 1

Answer:

1

Step-by-step explanation:

a=8

d=-5

Given that its, 1st term=8

2nd term=A= first term +common differnce(a+d).......1

3rd term=B=first term +2(common difference)(a+2d).......2

so putting values of a and d in ..1 and ...2

A=a+d

A=8+(-5)

A=8-5

A=3

B=a+2d

B=8+(2×-5)

B=8-10

B=-2

so putting values of A and B we get

A+B=3+(-2)

A+B=3-2

A+B=1