Post a New Question

maths

posted by .

Find a30 -a20 for the AP a, a+d, a+2d, a+3d........

  • maths -

    an=a+(n-1)d so a30=a+(30-1)d=a+29d
    Similarly a20=a+19d
    so their difference is; a+29d-(a+19d)=a+29d-a-19d=10d

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question