Question

write the value of 13 +23 +33 +4 3
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Answer 1

Answer:

112

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Answer 2

Answer:-

13 + 23 + 33 + 43

Direct method:-

36 + 76

= 112

Alternative method:-

We notice that the following sequence is in AP, hence we will solve it by applying the sum of n terms

Hence,

Sn = n/2 [ a + an ]

Sn = 4/2 [ 13 + 43 ]

Sn = 2 * 56

Sn = 112