Question

The nth term of the AP 4,9,14,19,.... is 49. Find n.


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Answer 1

Answer:

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Answer 2

Answer:

$\underline{\bigstar{\sf\ Given:-}}$

• AP = 4,9,14,19,....
• nth term = 49

$\underline{\bigstar{\sf\ To\:Find:-}}$

• n

$\underline{\bigstar{\sf\ Solution:-}}$

a = 4

d = 5

an = 49

an = a + (n - 1) d

49 = 4 + (n - 1) × 5

49 = 4 + 5n - 5

49 = 5n - 1

5n = 49 + 1

5n = 50

n = $\frac {50}{5}$

n = 10

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