Question

given that a=4,d=3,an=50 find the value of n

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Answer 1

Step-by-step explanation:

a = 5

d = 3

an = 50

an = a + (n-1) ×d

50 = 5+ (n-1) ×3

50-5 = (n-1) ×3

45 = (n-1) ×3

45÷3 = (n-1)

15 = (n-1)

n = 15 + 1

n = 16