Question

for a given ap the common difference is 5, and it's 15 th term is 72 .find the first term of an ap and its 50th term​

Answer 1

Answer:

Sum

Find the value of 10

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Answer 2

Answer:

Step-by-step explanation:

The logic behind given question is pretty much simple and can be given as

Unit's place = Addition of given two numbers

Ten's place = Difference in given two numbers

We can clearly see it in given expression

5+3=_8 ……..(I) and 5–3=2_ ……(II)

Combining result from (I) and (II) we get

5+3 = 28

Also ,

9+1=_10 ……..(I) and 9–1=8__ ……(II)

Combining result from (I) and (II) we get

9+1=810

Hence from above we can conclude that

7+3 = _10 and 7–3=4__

Hence result will be 7+3= 410

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