Question

Find the sum 2+4+6+.....+120
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Answer 1

Answer:

2+4+6+8+10........+120=3660

Answer 2

Step-by-step explanation:

Tn=a +(n-1)d

120 =2+(n-1)2

after slicing we get n =60

then using sum formula

Sn=n/2(2a+(n-1)d)

=60/2[2(2)+(60-1)2]

=3660

Sn is 3660