Question

The value of A30 - A20 for the A.P. 2, 7, 12, 17, ... (where A,n denotes the n-th
term of A.P.) is?
​

Answer 1

Answer:

150

Step-by-step explanation:

for AP a=2,d=5

A = a +(n-1)d.

A30= 2 + (30-1)5

=2+29×5

2+245

=247.

A20=2+(20-1)5

=2+19×5

=2+95

=97.

A30-A20 = 247-97

=150.

Answer 2

Answer:

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