Question

the following ap as follows 2,4,6.... what is the 20th term

Answer 1

a20=a+(n-1)d

a20=2+(20-1)2

a20=2+(19)2

a20=2+38

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a20=40

Answer 2

a20=2+(20-1)2.
a20=2+(19)2
a20=2+38
a20=40