Question

in an AP d=-4 n=7an=4 then a=?​

Answer 1

Answer:

28

Step-by-step explanation:

In an AP, an = a + (n-1)d

⇒ 4 = a + (7-1)(-4) [by given conditions]

⇒ 4 = a + 6(-4)

⇒ 4 + 24 = a

∴ a = 28

Answer 2

Answer:

a = 28

Step-by-step explanation:

=> an = a + (n-1)d

=> 4 = a + (7-1)(-4)

=> 4 = a + 6 × (-4)

=> 4 = a + (-24)

=> 4 = a - 24

=> 4 + 24 = a

=> 28 = a

=> a = 28

Thank You! :)