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Verified answer
D. 4n-2 itua suku pertama = 2
beda =4
U1 = a = 2
U2 = a+b =6
U3 = a+ 2b = 10
Dit. Un?
Beda(b) :
U2 = a + b = 6
U3 = a + 2b = 10
---------------- -
》 -b = -4
》 b = 4
Un = a + (n-1) b
》 Un = 2 + (n-1) 4
》 Un = 2 + 4n - 4
》 Un = 4n - 2
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