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Find the 20th term of the sequence 3, 11, 11, 15 ​

Sagot :

Answer:

Step-by-step explanation:

3,7,11,15

a1=3

a2=7

d=7-3

d=4

an=a1+(n-1)d

a20=3+(20-1)4

a20=3+19(4)

a20=3+76

a20=79

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