Find how many terms of a geometric progression 1+3+9 are required to make a total of more than 1 million.

The partial sum of a geometric sequence is

In your case a=3, so if we sum N terms of the sequence we have

We want this to me more than 1 million, so we have

Considering the log (base 3) of both sides, we have

So, starting from N=13, the sum of the first N terms will be more than 1 million

where is the rest of the

step-by-step explanation:

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

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