Question

Write the first three terms of the

a.p whose common difference is - 3 and first term is 4.

Answer 1

d= -3
a= 4

a2=a+d
= 4+(-3)
=4-3 = 1
a3=a+2d
=4+2(-3)
=4-6
-2
a4 = a+3d
=4+3(-3)
=4-9
= -5

Answer 2

Hi Mate !!


First term ( a ) = 4

Common difference ( d ) = ( - 3 )


• To find the nth term of A.P we have formula as :-

an = a + ( n - 1 )d

♯ Second term ( n = 2 )

a2 = 4 + ( 2 - 1 ) × ( - 3 )

= 4 - 3

= 1


♯ Third term ( n = 3 )

a3 = 4 + 2 × ( - 3 )

= 4 - 6

= - 2

♯ Fourth term ( n = 4 )

a4 = 4 + 3 × ( - 3 )

= 4 - 9

= - 5

So, the AP are :-

4 , 1 , (- 2 ) , ( - 5 ) .....