Find the sum of the first 7 terms of the series. 6-12+24-48+

258

Step-by-step explanation:

Since, the sum of GP is,

where r is the common ratio,

a is the first term,

n is the number of term,

Here, series is, 6, -12, 24, -48, _ _ _ _

Which is a GP ( Because there is common ratio in the given consecutive terms )

So, for the above series,  a = 6, r =  and  n = 7,

⇒

⇒

⇒

⇒

Thus, the sum of the 7 terms of the given series is 258.

b is 38 degrees.

a is 52 degrees.

this is because if b is 38 and a is 14 degrees more than b than 38+14=52 and 52+38=90 degrees. hope this .

so far i think you have the right thing going for you just remember soh cah toh

step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse