Find the sum of the first 6 terms of the series. 3-6+12-24+ a. –65 c. –62 b. –64 d. –63 select the best answer from the choices provided a) a b) b c) c d) d

Option d. (-63) is the sum of first 6 terms

Step-by-step explanation:

Given sequence is 3-6+12-24+...........

We know the formula for the sum of the sequence be

S(6) = A(1)×

From the given question n= 6

A(1) = 3

and common ratio r = (-6)/3 = (-2)

Now we put these values in the formula

S(6) = 3×

      = 3×

      = 3×(1-64)/3

      = 3×(-63)/3

       = (-63)

So the sum of six terms is (-63).      

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if x decreases by 4 then y increases by 10

step-by-step explanation: