Question

7
The 30th term of the AP = 28, 25, 22​

Answer 1

Answer:

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Step-by-step explanation:

Given: n=30, a=28, d = 25-28 = -3

∴ an=a+(n-1)d

a30 = 28+(30-1)(-3)

a30 = 28+(29)(-3)

a30 = 28+(-87)

a30 = -59

Answer 2

Step-by-step explanation:

Find d :•

d = a2 - a1

d = 25 - 28

d = -3

a30 = a + (n -1)d

a30 = 28 + (30-1)× -3

a30 = 28 +29 ×-3

a30 = 28 - 87

a30 = - 59

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