Question

5. In an A.P.Ifan = 5n - 24. find the 5th term?
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Answer 1

Answer:

1

Step-by-step explanation:

Given :-

In a A.P

• a_n=5n-24

To find:-

• 5th term of the A.P

Solution:-

$\\ \sf {:}\longrightarrow a_n=5n-24$

$\\ \sf {:}\longrightarrow a_5=5(5)-24$

$\\ \sf {:}\longrightarrow a_5=25-24$

$\\ \sf {:}\longrightarrow a_5=1$

Answer 2

Answer:

aN = 5n - 24

If n = 1

aN = 5n - 24

a1 = 5 × 1 - 24 = 5 - 24 = -19

If n = 2

aN = 5n - 24

a2 = 5 × 2 - 24 = 10 - 24 = -14

d = a2 - a1 = -14 - (-19) = -14 + 19 = 5

a5 = a + 4d = -19 + 4 × 5 = -19 + 20 = 1

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