Question

For the following arithmetic progressions write the first term $a$ and the common difference: $-5,-1,3,7,....$

Answer 1

Given Arithmetic progression (A.P) is

$-5,-1,3,7,........$

Hence the first term of the A.P is given by

$a=-5$

And the common difference of an A.P is given by the difference of two successive terms .

$(i.e.,d=a_{n+1}-a_n)$

Hence by putting n=1 in above expression we get

$d=a_2-a_1$

$Put{a}_1=-5and{a}_2=-1$

$d=(-1)-(-5)$

$d=(-1+5)$

$d=4$