Question

please give correct answers

Answer 1

I think we have to find the value of n and d. Because a value is already given.

Given First term a = 8

Given nth term l = 33

Given sn = 123.

We know that sum of n terms sn = n/2(a + l)

                                                  123 = n/2(8 + 33)

                                                  123 * 2 = n(41)

                                                  246 = 41n

                                                  n = 246/41

                                                  n = 6.



We know that last term l = a + (n - 1) * d

                                      33 = 8 + (6 - 1) * d

                                      33 = 8 + 5d

                                      33 - 8 = 5d

                                     25 = 5d

                                        d = 5.


Hope this helps!

Answer 2

Hope it helps....


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