Question

Find the 30th term of Ap 10,7,4,..........?

Answer 1

AP : 10, 7, 4, .....

First term (a) = 10

Common difference (d) = 7 - 10 = - 3

Number of terms (n) = 30

____________ [ GIVEN ]

• We have to find the 30th term of an AP.

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$a_{n}$ = a + (n - 1)d

→ $a_{30}$ = 10 + (30 - 1)(-3)

→ $a_{30}$ = 10 + (29)(-3)

→ $a_{30}$ = 10 - 87

→ $a_{30}$ = - 77

______________________________

30th term of an AP is - 77

___________ [ ANSWER ]

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Answer 2

Answer

a = 10

d = -3

a30 = a + 29d

=> a30 = 10 - 87

=> a30 = -77