Question

4) First term and common difference of an A.P.
are 6 and 3 respectively; complete the following
activity.
a=6, d=3, S2 = ?
S. = [ +(n-1)d]

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Answer 1

Step-by-step explanation:

Solution:   a = 6, d = 3,  S27S27 = ?

      SnSn = n2[2a+(n−1)d]n2[2a+(n−1)d]

     S27S27 = 272[2∗6+(27−1)3]272[2∗6+(27−1)3]

     S27S27 = 272[12+(27−1)3]272[12+(27−1)3]

     S27S27 = 272[90]272[90]                              [∴ 12 + 26 × 3

                                                              = 12 + 78 = 90]

      S27S27 =  27 × 45

             =  1215 

I Hope It Will Help!

^_^

Answer 2

Answer:

9

Step-by-step explanation:

hope useful for you

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