Question

2,6,18 sum of the series upto 7th term A)210 B)215 C)310 D)315​

Answer 1

Answer:

$s7 = 98$

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

a= 210 , d= 5

therefore , S7 = 7/2 ( 420 + 30 )

S7= 7/2 ( 450)

S7= 7(225)

S7= 1575